George W. (George Washington) Tryon.

Manual of conchology. Second series: Pulmonata (Volume series 2, vol. 12) online

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white within (but in the variety with a broad blackish-chestnut cal
lus throughout), wanting in young shells.

Alt. 84, diam. 54, longest axis of aperture 56 mill, (var.)

Alt. 53, diam. 39, longest axis of aperture 38 mill.

Alt. 70, diam. 50 mill.

La Poule Sultane, FAVANNE, Cat. Syst. p. 13, pi. 1, f. 47
Helix gallina sultana CHEMNITZ, Conchyl. Cab. xi, p. 281, pi. 210, f.
2070, 2071 (1795).* BuUmus gallinasultana LAM., An. s. Vert, vi, p.

117 (1822) WAGNER, in Spix, Testae. Bras. p. 9 ORBIGNY,

Voy. dans l'Ame>. Merid. p. 265 REEVE, Conch. Syst. ii, pi. 173,
f. 7 ; Conch. Icon. pi. 32, f. 198. KUSTER, Conchyl. Cab. p. 8, pi.
8, f. 1, 2. TROSCHEL, Archiv fur Naturg. 1849, i, p. 228, pi. 4, f.
2 (dentition) ; Reisen in Britisch-Guiana (Schomburgh), iii, p. 547.
HUPE in Castelnau, Exped., p. 38 (1857). DROUET, Moll. Terr.

et Fluv. Guyane Francaise, p. 66 (1859) PFR., Monogr. ii, p. 145 ;

iii, 381 .Succinea gallina- sultana PFR., Symbolre ad Hist. Hel., ii,

p. 131 (1841) Orthalicus gallinasultana SHUTTLEWORTH, Notitiae

Malac. i, p. 59 (1856.) PFR.,. Monogr. iv, p. 587; vi, p. 198, viii,
p. 261. BINNEY, Ann. Lye. Nat. Hist, of N. Y. xi. (1874), p. 38,
pi. 4, f. A-F(anatomy) ; Ann. N. Y. Acad. Sci. iii (1884), p. 128,
pi. xv, f. N (jaw), pi. xii., f. C (dentition) STREBEL, Beitr. Mex.
Land- und Siisswasser-Conch. v. p. 2, pi. xi, f, 10 (genitalia).
MARTENS, Conchol. Mittheil., p. 158. Sultana gallina sultana
MILLER, Malak. Blatt. xxv, p. 186. COUSIN, Bull. Soc. Zool. de
Y ranee, xii, 1887, p. 196.

Helix sultana, DILLYVYN, Descriptive Catal., ii, p. 920 (1817).
FEU., Prodr., p. 52; Histoire, pi. 117, f. 2. WOOD, Index Testa-
ceologicus, pi. 33, f. 75. ORBIGNY, Mag. de Zool. 1835, p. 8
Achatina sultana SWAINS., Exotic Conchology, p. 26, pi. 10 (1841).
Orthalicus sultan BECK, Index Moll., p. 59 (1837). Achatina
pavonina SPIX, Testae. Bras., pi. 9, f. 1 (1827) Bulimus princeps
POTIEZ & MICHAUD, Galerie des Moll., i, p. 151, pi. 14, f. 29.
Orthalicus gallina sultana and 0. pavoninus H. & A. AD., Gen. Rec.
Moll., ii, p. 154.

The Guianas: All over British Guiana, on tree trunks (Schom-
burgk); around Cayenne, French Guiana (Eyries). N.-E. Brazil:
on the Rio Tocantins, in the region of Baiao, 5 meters above the sea



190 ORTHALICUS.

(Stiibel). Peru : Maranon (Orton). Bolivia : Middle of the
republic, and near the Mission of Bibosi, 20 leagues from Santa Cruz
de la Sierra (Orbigny).

The thin lip and columella distinguish this species from the 0.
trullisatus. The typical form (figs. 6, 7) is from the Guianas, where
it is a widely-distributed and common shell. The specimens from
the upper Amazon drainage belong to a more oblong, darker colored
race, noticed below. It is a magnificent snail, formerly very rare ;
Ferussac is said to have paid 560 francs for his specimen, at the sale
of the Count de Latour d'Auvergne.

It is usually known as 0. gallinasultana, Chemnitz, variously
written as one word, compounded with a hyphen, or as two words,
the latter being Chemnitz's mode. It was not originally a binomial
name, and even those who accept it do not extend their liberality to
other trinomials in the same volume of Chemnitz. The first binomial
name is that of Dillwyn.

D'Orbigny distinguished two varieties : the typical form of Guiana,
which is shorter, more ventricose, and another discovered by him in
Bolivia, which is more elongated, larger, with five spiral zones and
black-bordered peristome. This race (pi. 47, fig. 8) which may be
what Pffeifer called B. meobamben&is, was met with by d'Orbigny
in the great humid forests of mid Bolivia, inhabited by the wild tribe
of Guarayos. It remains deeply buried at the feet of the trees, com-
ing forth upon the trunks of trees only in the rainy season, when
only it may be procured. He gives the size as 80 mill, long, 45
wide. It is apparently what Herr Stiibel collected on the Rio
Tocantins, described by Dr. von Martens as follows : It " is somewhat
more slender than the usual form from Guiana and Surinam, the
outer lip with a narrow, distinctly defined black-brown border inside,
parietal wall black-brown throughout, the upper half of the colu-
mellar margin white, lower half dark brown. Length 73, diam. 48,
height of aperture 48, breadth 30 mill. Approaches 0. trullisalus
Shuttl., but the columellar margin is thin and concavely arched, as
in 0. gallina sultana."

Beck attempts to distinguish two varieties : a, cayanensis, based
upon the figure given by Spix, the locality of which is unknown, and
b, bolivianus, based upon Chemnitz's figures (which are the basis of
typical sultana), and those of Ferussac. The latter represents a
Guiana shell. It would seem that these two varietal names must
fall as pure synonyms of typical 0. sultana.



ORTHALICUS. 191

O. MEOBAMBENSIS (Pfeiffer).

. Shell imperforate, ovate-conic, rather solid, closely striated, and
somewhat granulated by spiral striae; green-whitish, with interrupted
black bands combined with waved streaks, and above the middle
with large, angular, black spots. Spire conic, obtuse ; whorls 6J, a
little convex, the last five-eighths the total length, ventricose, some-
times bearing varices. Columella compressed, white-calloused,
straightened and receding.

Aperture oblique, angulate-oval, pearly within, the peristome
black-margined, a trifle expanded, margins connected by a blackish-
chestnut callus. Alt. 88, diam. 46 mill ; aperture 55 mill, long, 33
wide (Pfr.).

Moyobamba, Peru (Yates, in Cuming coll.)

Bulimus meobambensis PFR., P. Z. S., 1855, p. 96 (printed July
23, 1855, see P. Z. S., 1893, p. 439). Bulimus gallinasultana 8,
PFR., Monogr. iii, p. 381. Orthalicus meobambensis PFR., Monogr.
iv, p. 586. 0. moyobambensis, MART, in Albers' Die Hel., edit. 2,
p. 225.

"Differs from 0. gallinasultana in the' oblong form, more solid
texture, more convex whorls and straight columella " (Pfr).

Pfeiffer, in the Monographia, places 0. trullisatus as a synonym
under meobambensis. From the description, translated above, I would
think meobambensis identical with the upper Amazonian variety of
0. sultana. As I am unable to decide the question, the original de-
scriptions are given.

O. TRULLISATUS Shuttleworth. PI. 47, figs. 9, 10, 11.

Shell ovate-acuminate, rather thin, very closely rugose-striate, de-
cussated with remote impressed spiral lines and others very close,
granulose and somewhat undulating (fig. 10); scarcely shining, dull
greenish buff, encircled with five purple-black bands articulated with
white, with scattered narrow brown streaks, broad, ragged, blackish-
purple blotches, and whitish spots. Spire conic, nuclear apex
baifded with black-brown and pitted (fig. 9); suture moderate;
whorls 6^, a little convex, the upper ones purplish, conspicuously
streaked, the last nearly twice the length of the spire, rounded at
base. Columella a little straightened, callously thickened, black-
brown, obliquely subtruncate at base. Aperture a little oblique,
oblong-oval, opaque milky inside ; peristome somewhat duplicated,



192 ORTHALICUS.

unexpanded, broadly bordered inside with a blackish-purple callus ;
the margins joined by a somewhat thick black-brown callus, strongly
thickened outside at the base of the columella. Alt. 90, diam. 52,
length of aperture 53, width 33 mill. (Shuttl)

Tarapoto, Eastern Peru (Moricand).

Orthalicus trullisatus SHUTTL., Notitiaa Malacologicae i, p. 58 (ex-
clusive of synonymy), pi. 5, f. 1 (1856).

Intermediate between 0. gallina- sultana and 0. dennisoni ; differing
from 0. dennisoni in the thinner, more inflated shell with more convex
whorls, the blackish-purple bands, and color of the aperture and
columella; from 0. gaUina-sultana it differs in the more solid shell,
which is opaque and more slender, in the thickened black-brown col-
umella, and color of the aperture and peristome (Shuttl.).

Subgenus METORTHALICUS Pilsbry, 1899.

Porphyrobaphe, in part, of Shuttle worth and other authors. Bui-
inus, BUODERIP, Zoological Journal iv, p. 222 (1828), not of O. F.
Miiller, 1781.

This new group includes species with pitted nepionic whorls as in
typical Orthalicus, but differing in the solidity of the shell and its
thick, blunt or reflexed lip.

GROUP OF O. FRASERl.

The species placed here are related to typical Orthalicus in colora-
tion and sculpture, differing in the less ventricose. form, and devel-
oped peristome. 0. galactostoma and 0. augusti are stated to have
smooth apical whorls; and if this proves to be true, they must be re-
moved to Porphyrobaphe.

Key to species.

a. Columella with a rather strong fold above ; aperture more than
half the length of the shell ; having bands of blackish spots or
streaks.

b. Aperture purplish-fleshy within. frasert, p. 193.

ft 1 . 1 Aperture and peristome milk-white, columella making an

angle with the basal lip. galactostoma, p. 194.

a 1 . Columella not folded above, but twisted below ; aperture less

than half the length of shell, of a deep livid rose color, the lip

whitish; shell very long, alt. 93, diam. 36, aperture 37 mill.

buckleyi, p. 193.



ORTHALICUS. 193

z . Columella without noticeable folds; aperture exceeding half
the length of shell. augU8ti,p. 195.

O. BUCKLEYI Higgins. PI. 41, fig. 6.

Shell imperforate, oblong-conic, solid: sculptured with irregular
longitudinal rugose costae and close, irregular, deeply impressed
spiral lines. Fleshy-rubescent under a yellowish-tawny epidermis.
Longitudinally ornamented with reddish-brown streaks.

Spire conic, the apex obtuse, suture whitish. Whorls 7, a little
convex, the first two minutely granulose-striate, the last nearly equal
to the spire, tapering at base. Columella thick, twisted at base,
flesh colored. Aperture subvertical, acuminate-oblong, of a deep
roseate livid color inside; peristome thickened, expanded, narrowly
reflexed, whitish outside, the margins joined by a thin glossy callus.
Alt. 93, diam. 36, length of aperture 37, width 17 mill. (Hiygins}.

San Lucas, Ecuador (Buckley).

Orthalicus (Porphyrobapha) buckleyi HIGGINS, P. Z. S. 1872, p.
685, pi. 56, f. 3. Bulimus buckleyi (Orthalicus) PFR., Monogr. viii,
p. 21. Porphyrobaphe buckleyi MILLER, Malak. Blatt. xxv, p. 185.
COUSIN, Bull. Soc. Zool. France xii, p. 200.

No additional information is given by the authors mentioning this
remarkable species subsequent to Higgins.

O. FRASERI (Pfeiffer). PI. 46, figs. 31-35.

Shell imperforate, oblong-fusiform, solid, longitudinally closely
striated and encircled by remote impressed lines. Flesh-colored under
a lusterless greenish-tawny epidermis, ornamented with interrupted
bands of arrow-shaped black-brown marks, or confluent into light-
ning-streaks. Spire conic, the apex rather obtuse, whorls 6, a little
convex, the last about the length of the spire, tapering at base; colu-
mella violaceous, provided with a strong fold above, somewhat
twisted below.

Aperture very oblique, semi-elliptical, subangular at base, milk-
white inside, peristdnie roseate, thickened and expanded, the margins
joined by an entering, glossy lilac tinted callus; columellar margin
narrow, adnate. (Pfr.).

Alt. 89, diam. 37, length of aperture with peristome 49 mill.

.

13



194 ORTHALICUS.

Ecuador: Province of Cuenca (Fraser, in Cuming coll.) ; Railroad
of Quito, 30 or 40 kilometers from Chimborazo. (Paz.)

Bulimus fraseri PFR., Malak. Blatter, v, 1858, p. 239 ; P. Z. S.
1860, p. 137, pi. 51, f. 5; Novit. Conch, p. 157, pi. 42, f. 1, 2;
Monogr. vi, p. 15. HIDALGO, Journ. de Conchy 1. 1870, p. 44.
Porphyrobaphe fraseri Pfr., MILLER, Malak. Bl. xxv, 185 COUSIN,
Bull. Soc. Zob'l. France xii, p. 200. DOHRN, Jahrb. d. D. Malak.
Ges., ix, 1882, p. 114.

Dohrn remarks that the coloration of his specimens is variable ;
the upper whorls have a subsutural band of white and dark brown
spots ; the shells are smaller than Cuming's, though of the same form
and sculpture, measuring:

Alt. 73, diam. 33, length of aperture 43, width 27 mill.

Alt. 67, diam. 30, length of aperture 41, width 22 mill.

Alt. 60, diam. 25, length of aperture 36, width 20 mill.

Pfeiffer's type (fig. 31) and the specimen figured in the Novitates
(figs. 32, 33), are decidedly more lengthened than the only one I
have seen, which probably represents a race or variety.

Var. IJREVISPIRA, n. v. (pi. 46, figs. 34, 35). Decidedly shorter
than typical fraseri, with larger aperture ; surface decussated with
close spiral grooves ; 2^ nepionic whorls thimble-pitted, distinctly
demarked from the post-natal growth ; whorls of the spire with occa-
sional angular blackish stripes and fine brown wavy streaks, the last
whorl with four girdles of blackish arrow-spots and some black
streaks, on a ground of brown-stained, somewhat olivaceous yellow,
becoming duskier and reddish below ; lip obtuse, thick, expanded,
reflexed below, white; columella purplish with white folds, the
parietal callus 'transparent, lilac tinted. Alt. (JO, diam. 38, longest
axis of aperture 44^ mill.

O. GALACTOSTOMA (Ancey). Urtfigured.

Shell imperforate, ovate, solid ; whitish under a buff, but little
shining epidermis, irregularly marked with spots and interrupted
streaks, brownish above, brown greenish on the last whorl, and
arranged in four rather wide, indistinct transverse stripes. Spire
conoid-attenuated, rather short, obtuse ; whorls 6, rapidly increas-
ing, convex ; suture irregular, slightly crenulated ; embryonic
whorls smooth, the following ones delicately granulated, the lower
whorls obliquely grooved with impressed growth-stria? and



ORTHALICUS. 195

decussated by remote spiral lines, last whorl oblong, attenuated,
ample.

Aperture large, ovate, angulated above, tapering below and with
the peristome milk-white within, showing the spots; moderately
oblique, slightly receding below ; columella acutely folded above,
thickened, white, becoming nearly straight, tapering below, forming
a distinct angle with the basal lip ; margins joined by a glossy whitish
callus ; peristome thickened, expanded, umbilical region narrowly
marked with brown. (Ance.y.}

Alt. 72, diam. 34, alt. of aperture 40 mill. Ecuador.

Porphyrobaphe yalactostoma, ANCEY, Bull. Soc. Malac. France,
vii, p. 153 (1890).

Akin to Porph. fraseri Pfr. and especially Porph. cousmi Jouss. r
but differing from both chiefly in the color, especially of the aperture,,
and the characters of the columella. (Ancei/.^)

An unfigured species, apparently more slender than fraseri, with
shorter mouth. Ancey apparently intends P. augusti by his reference
to " Porph cousini."

O. AUGUSTI (Jousseaume). PI. 44, fig 20.

Shell imperforate, fusiform-ovate, solid, lightly granule-striated, en-
circled by white and greenish bands. Spire conic, the apex obtuse ;
whorls 6, the first but little convex, the last four-sevenths the total
length, more convex. Aperture oblong-oval, white within, with a
pearly lustre ; peristome violaceous, thickened, reflexed ; columella
white, slightly arcuate, the margins joined by a glossy callus. (Jouss.)

Alt. 69, diam. 34, length of aperture, 40 mill.

Ecuador : Machai, valte del Pastaza, 4900 ft. alt. (Wolf).

Porphyrobaphe augusti Jouss.. Bull. Soc. Zool. de France, xii, p.

165, pi. 3, f. 10 (August 1, 1887) COUSIN, t. c., p. 203 Orthal-

icus (Pophyrobaphe) augusti REIBUCH, Sitzungsber. u. Abh. natur-
wiss. Gesell. Isis, in Dresden, 1896, p. 57 [bis] (1897).

This form is apparently a member of the group of 0. fraseri, dif-
fering from that species chiefly in its simple columella. Good speci-
mens will probably show a thimble-pitted nepionic shell. Joussc aume
gives further details of the coloration as follows : The two earlier
whorls are smooth and yellowish ; the following ones are ornamented
with fine longitudinal denticulated striae, quite regular and crowded,
and decussated on the later whorls by revolving strise which are not



196 ORTHALICUS.

conspicuous, ami more or less spaced. The color of the third whorl
is formed of two zones of about the same width ; the anterior one yel-
lowish with brown spots behind, the posterior one white with quite
large, spaced ehesnut-brown spots; on the following two whorls there
are waved lines of light chestnut on a yellowish ground, and occa-
sional very irregular long spots of deep brown. The last whorl,
which is a little ventricose, is of a dead-leaf color, ornamented with
four revolving zones of very pale green, the anterior three wide arid
closer together than to the narrower posterior zone.

The locality in Ecuador of the original specimen was not known,
but Dr. Wolf collected two specimens at the locality given above.
One of them is very similar to the type in coloration, but the oilier,
agreeing with the type in form and size, the coloration of the aper-
ture, lips and columella, has four alternating narrow and broad bands
composed of spots shaped like long, pointed scales. This is more
like 0. fraseri, and is considered by Herr Reibisch to be a more
normal coloration than that of the type.

GROUP OF 0. DEBURGHIA:.

The shell is smoothish with fine and rather shallow spiral striation,
a pure white aperture and strongly-folded columella. 0. deburghice
is not an uncommon shell, but wrzesniowskii is as difficult to get as
its name is to pronounce, and maranhonensis is still known by the
type specimen only.

Key to species.

a. Shell with numerous broad dark stripes separated by narrow
zigzag yellow stripes, a wide subsutural zone paler; the per-
iphery and a small basal tract encircled by interrupted blackish
lines. deburgliice, p. 196.

a 1 . Shell flesh-tinted, with narrow brown streaks and dull lilac
dots ; aperture over half the total length, wrzesniuwskii, p. 198.
a 2 . Shell tawny, with livid clouds and irregular blackish streaks
and spots ; aperture less than half the total length.

maranhonensis, p. 198.

O. DKBURGHI^E (Reeve). PI. 39, figs. 3, 5 ; pi. 42, figs. 9, 10, 11.
Shell ovate-conic, thick and solid. Pale yellow (white when de-
nuded of the thin cuticle), with broad, zig-zag, blackish-olive (or
when denuded, purplish-black) stripes which abruptly cease at the






ORTHALICUS. 197

upper fifth of the last whorl, or fade to a much fainter tint there,
leaving a broad, pale zone below the sutures ; the stripes becoming
rich chestnut on the spire, the base with a small pale area below; en-
circled by a narrow, frequently interrupted, peripheral, blackish- chestnut
band, and a similar but less interrupted one at the base. Surface
rather smooth to the eye, but under a lens showing irregular growth-
wrinkles, and close, irregular spiral stria 1 ,. Whorls 6^, moderately
convex, the first three forming a netted-striolate or punctate nepionic
shell, somewhat more attenuated than the subsequent outlines; apex
obtuse ; last whorl convex. Aperture pure white throughout ; per-
istome thick, reflexed ; columella with a strong, short fold above ;
parietal callus heavy, pure white.

Alt. 2f, diam. 1^ inch. (Reeve's type).

Alt. 61, diam. 33, longest axis of aperture 32J mill. (fig. 31).

Alt. 75, diam. 34 mill. (Hidalgo, for gloriosus).

Alt. 78, diam. 34, aperture 38 mill. (Pfr. for gloriosus}.

Bulimus deburghice REEVE, P. Z. S. 1859, p. 123 PFR., Monogr.
vi, p. 15 Porphyrobaphe deburghica MILLER, Malak. Blatt. (n. F.)
i, p. 119. DOHRN, Jahrb. d. D. Malak. Ges. ix, 1882, p. 112.

COUSIN, Bull. Soc. Zool. France xii, p. 200 Bulimus gloriosus

PFR., P. Z. S. 1861, p. 387, pi. 37. f. 4; Monogr. vi, p. 14 HID-
ALGO, Mol. Viaje al Pacifico, p. 62, pi. 4, f. 2, 3 Porphyrobaphe

yloriosus MILLEII, Malak. Blatt. xxv, 1878, p. 185; and (n. F.), i,
p. 200, pi. 5, f. 1 (var. elongata). Conf. DOHRN, 1. c. Orthalicus
(Porphyrobaphe) gloriosus MARTENS, Conchol. Mittiieil. p. 159.
REIHISCM, Sitzungsber. n. Abhamll. Nat. Ges. Isis, 1896, p. 57
\bis\ (1897). Bulimus duburghii Reeve, HIGGINS, P. Z. S. 1872,
p. 687.

Peru : banks of Amazon river (Reeve). Ecuador : San Jose
^(Isern and Espada); Nanegal (Wolf); road to Canelos (Stiibel); Rio-
bamba (Cisneros) ; Machai, val/e del Pastaza, 4900 ft. above the sea
(Wolf).

The broad pale zone below the suture, bold marking of the median
portion of the body-whorl, and two narrow, interrupted girdles, with
the fine spiral striation of the surface and pure white aperture, lips arid
parietal wall, easily separate this from the other species. Pfeiflfer's B.
gloriosus (fijr. 9) has no varietal characters. The species is a variable
one in size and contour, as well as in the prominence of the columellar
fold. The number of whorls varies from 6^ in small shells, to 7 or 7-J-



198 ORTHALICUS.

in large ones. Miller distinguishes a var. elongata (fig. 5), which has
a strong columellar tooth, and the last whorl attains only two-fifths
the total altitude of the shell. Alt. 90, diam. 34, aperture inside 34
mill, long, 18 wide.

In one of the specimens taken by Herr Stiibel, and recorded by Dr.
von Martens, the flames disappear on the last whorl. Reibisch states
that one of the 21 specimens collected by Dr. Wolf is 80 mill, long;
several of the others being only 60 mill. One specimen is uniform
brown, except for the characteristic black spiral lines.

0. WRZESNIOWSKII (Lubomirski). PI. 42, figs. 7, 8.

Shell imperforate, ovate-elongate, solid, glossy, longitudinally stri-
ated, and very minutely decussated. Fleshy-fulvous, ornamented
with longitudinal streaks of brown and dull lilac dots. Spire conic,
obtuse; whorls a little convex, the last as long as the spire, tapering
at base. Columella callous, plicate-twisted. Aperture ear-shaped,
angular at the base, white within ; peristome white, thick and ex-
panded, the margins joined by a very glossy white callus, columellar
margin folded and adnate. Alt. 78, diam. 37 mill.; aperture with
the peristome 42 mill, long, 16 wide inside; peristome 4 mill, wide
(Lubomirski}.

Tambi/lo, Peru (Stolzmann).

Bulimus (Porphyrobaphe) wrzesniowskii LUBQMIRSKII, P. Z. S.,
1879, p. 721, pi. 55, f. 7,8.

In the form of the aperture this euphoniously named species agrees
with 0. yatesi, but the spiral discussating striae and white lips, colu-
mella and parietal wall, ally it rather to O.deburghice. Described from
a single specimen, now in the Varsovie museum. I am not aware
that others have been found.

O. MAUANHONENSIS (Albers). PI. 41, figs. 3, 4.

Sliell imperforate, ovate-oblong, solid, densely striated and decus-
sated by very light, undulating spiral striae. Tawny, livid-clouded,
and irregularly painted with blackish streaks and spots. Spire long-
conic, the apex obtuse ; suture with a thread-like margin. Whorls
7, a little convex, the first minutely granulated, pale flesh-colored,
the last shorter than the spire. Columella callous, white, strongly
fold-twisted. Aperture little oblique, obauriform, whitish and
glossy inside ; peristome thickened, narrowly expanded, the margins



ORTHALICUS. 199

joined by a glossy whitish callus. Alt. 76, diam. 30 ; aperture, in-
side, 31 mill, long, 15 J wide (Albers).

On the Maranon river in Colombia [now Peru], (Warscewicz).

Bulimus maranhonensis ALB., Malak. Blatter, i, 1854, p. 216
PFR., Novit. Conch, i, p. 42, pi. 11, f. 11, 12 ; Monogr. iv, p. 370.

Albers does not state the color of the lip, but it seems from the
badly-colored figure to be white, shading into brown towards the
outer edge. The Albers collection, now I believe in the Berlin
museum, contains the only specimen yet put on record.

GROUP OF O. LABEO.

Species without spiral striation, the peristome colored, varying
from blackish to brown or flesh-colored, the columella folded ; exter-
nal coloring vivid in the species of Ecuador, rather plain in those of
Peru.

Key to Species,
a. Peristome well reflexed (species of the Maranon drainage).

b. Peristome reddish ; shell with broad chestnut zigzag

streaks. shuttleworthi, p. 201

ft 1 . Peristome and parietal wall very dark or black brown ;

shell with narrow dark lines at periphery, base, and suture,

and a few streaks.

c. Lip smooth, purplish brown. vicarius, p. 200

c 1 . Lip punctured, very brown and dark, labeo, p. 199

a 1 . Peristome reddish-brown or pink, blunt and thickened, more or

less expanded, but hardly reflexed ; color of arrow-shaped or

trapezoidal spots in bands.

b. Aperture somewhat angular at base of the columella.

yatesi, p. 202
ft 1 . Aperture evenly rounded beneath. kelletti, p. 204

O. LABEO (Broderip). PI. 44, figs 21, 22.

" Shell stout, long-oval, of a brown-chestnut color, changing to
red at the apex and on the upper whorls, which last are longitudi-
nally striped with reddish-brown towards the suture. Whorls 6,


1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 19 21 22 23 24 25

Online LibraryGeorge W. (George Washington) TryonManual of conchology. Second series: Pulmonata (Volume series 2, vol. 12) → online text (page 19 of 25)