George W. (George Washington) Tryon.

Manual of conchology; structural and systematic. With illustrations of the species (Volume 15) online

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the apex, rather inflated in the middle ; aperture narrow ; colu-
mella arched ; outer lip raised, acuminated (Soivb.).

Habitat unknown.

A. amygdala SOWB., C. Icon. t. 2, f. 6 a, b (1869).

Resembling Atys elongata, it is yet, nevertheless, less cylindrical
than that species, and is slightly striated in the longitudinal direc-
tion (Sowb.).

A. PORCELLANA Gould. PL 28, fig. 23.

Shell small, thin, ovate-cylindrical, milk-white, grooved with
transverse striae increasing toward the ends ; apex funnel-shaped,
imperforate. Aperture narrow, widened in front, the base subtrun-
cate ; columella deeply arcuate, subperforate, provided with a strong

callus. Alt. 12, diam. 5 mill. (<?.)

Kagosima Boy, Japan.

Atys porcellana GLD., Proc. Bost. Soc. N. H. vii, p.. 138. SOWB.
(as of Guildiug), Conch. Icon. f. 30.



ATYS. 269

Mr. Sowerby's mistakes in regard to the authority and localities
of Gould's species have been corrected by E. A. Smith, Ann. and
Mag. N. H. 1872, p. 345. It is not easy to see how so many errors
could be made as occur in the later volumes of the Conchologia
Iconica, even when it is understood that they were written with-
out reference to the literature of the groups monographed.

A. LABIOSA Philippi. Unfigured.

Shell small, short, ovate, cylindric, very smooth, very delicately
transversely striated at the base when viewed under a strong lens ;
spire retuse, whorls 2 ; aperture linear, dilated at base and unipli-
cate, continued above in a channel to the center of the vertex ;
margins of inner and outer lips thickened, obtuse. Alt. 1, diam.
s lines. (Ph.}.

China (Largilliert).

Sulla labiosa PH., Zeitschr. f. Mai., 1851, p. 64.

The generic position is (Uncertain. An error (probably typo-
graphical) in Philippi's description has been corrected above.

A. TRANSLUCENS A. Adams. Unfigured.

Shell cylindric-ovate, thin, pellucid, transversely striated at the
ends, the stride distant, the median area glabrous. Aperture nar-
row ; inner lip straight, truncated anteriorly ; outer lip somewhat
straightened in the middle, posteriorly twisted and produced, ante-
riorly crenulated (Ad.').

Port Hamilton, lOfms.

Alicula transhicens A. AD., Ann. Mag. N. H., (3), ix, p. 159.

This species most nearly resembles Alicula succisa Ehrenberg,
from the Red Sea, but is narrower and more cylindrical in form,
and is thin and nearly transparent. (Ad.}.

A. SECALINA A. Adams. Unfigured.

Shell cylindric-ovate, rimate, the apex subtruncate and slightly
perforated, semi-opaque, corneous, transversely striated throughout,
strise distant, obsolete in middle. Aperture linear; inner lip
oblique, somewhat thickened ; outer lip a little straightened in the
middle. (Ad.).

TsU'Sima, Japan, 25 fms.

Alicula secalina AD., Ann. Mag., (3), ix, p. 159.



270 ATYS.

This is a small, grain-like, horn-colored species, with the apex
small and truncate, and the outer lip hardly produced beyond it.
(Ad.).

A. VOLVULINA A. Adams. Unfigured.

Shell cylindric-ovate, rimate, acuminate and transversely striated
at both ends, the strife distant ; white, thin, opaque, shining. Aper-
ture narrow ; inner lip obliquely flexuous, thickened in front ;
outer lip regularly arcuate. (Ad.).

Tsu-Sima, Japan, 26 fms.

AliGida volvulina AD., Ann. Mag. N. H., (3), ix, p. 159.

A little, white shining species, acuminate at both ends, like a
Volvula, but with the sunken spire and twisted outer lip of an Atys..
(Adj.

A. EXIGUA A. Adams. PI. 28, fig. 24.

Shell small, elongately oval, posteriorly narrowed, white, shining,
longitudinally substriated, under the lens very minutely striated ;
aperture narrow, linear, anteriorly dilated ; outer lip posteriorly
produced, flexuous; inner lip subcallous. (Ad.).

Port Lincoln.

B. (Atys} exigua AD., Thes., p. 589, pi. 125, f. 129. A. exigua
Sows., C. Ic., f. 19.

A. PARVULA A. Adams. PI. 28, fig. 18.

Shell small, oval, white, shining, transversely entirely striated,
stride close together ; outer lip arched, posteriorly produced, ante-
riorly dilated ; inner lip slightly tortuous, subtruncated. (Ad.}.

Port Lincoln.

B. (Atys) parvula AD., Thes., ii, p. 590, pi. 125, f. 130. A. par-
vula Sows., C. Ic., f. 25.

A. HORDEACEA A. Adams. PI. 28, fig. 25.

Shell small, oval, white, shining, transversely strongly entirely
striated, strire rather wide apart ; outer lip arched, posteriorly pro-
duced, anteriorly rounded ; inner lip anteriorly strongly twisted,
subtruncated. (Ad.).

Port Lincoln, Australia.

B. (Atys) hordeacea AD., Thes., p. 590, pi. 125, f. 131. A. lior-
dacea SOVVB., C. Ic., t. 4, f. 20.



ATYS. 271

A. HYALINA Watson. PI. 32, fig. 36.

Shell oval, subgibbous, a little abruptly contracted and slightly
constricted and truncated above, striated, thin, hyaline, umbilicated,
with a longish curved mouth. Sculpture : Longitudinals there
are very many slight equal hair-like lines of growth. Spirals
with the exception of a narrow, nearly medial band which is smooth,
the whole surface is scratched with fine, smooth, regular, square-cut,
widely parted furrows. These are rather more regularly arranged
above than below, where the interstices are more wide and less reg-
ular ; but toward the end of the shell in both directions the furrows
tend to become crowded ; they extend to the very edge of the fun-
nel-shaped depression of the apex ; but the depression itself is
smooth, except for the twisted edge of the outer lip, which at the
generic sinus is reverted as usual, but somewhat narrowly ; in front
they score the umbilicus on one side, but do not quite extend to the
edge of the pillar. Colour hyaline to translucent. Mouth long,
curved, rather narrow, and not much enlarged in front. Outer lip
convex, posteriorly produced; the generic twisted sinus is rather
small, above it the lip rises and advances, and forms a sharp curve,
from this point the lip runs out to the right, at first straight or
faintly concave, and here a little contracted, but afterwards with a
very regular curve, and increasingly patulous to the point of the
shell. Top very obliquely truncate, with a bluntish edge and a
small funnel-shaped depression, which, through the generic sinus
leads into the interior of the shell. Inner lip : there is no glaze on
the body, the curve of which is a little gibbous above ; the pillar
edge is narrow, reverted, bluntly toothed, twisted and truncated in
front ; at the top of the pillar this edge is very much twisted, and
is there separated from the body, leaving a very narrow but deep
fissure communicating with the deep umbilicus which lies behind,
and is partly covered by the expanded and projecting pillar edge.
Alt. 0'44 in. diam. O24. Breadth of mouth at same place, 0'07
inch ( Wats.}.

Lev iika, Fiji, 12 fms. ; Wednesday Island and near Cape York, N*
Australia, 6-8 fms.

Atys hyalina WATS., Cliall. Gastr. p. 640, pi. 48, f. 1.

I do not know any Atys with which to compare this very beauti-
ful and delicate species. It has something of the gibbosity of Atys
cylindrica (Helb.), var. solida, in its stumpiest forms ; but the tex-
ture of the shell, the sculpture, and the umbilicus, are very differ-



272 ATYS.

ent. The specimens from Stations 186 and 187 are quite young
shells, but are, I have no doubt, this species. From Honolulu, 40
fathoms, there is a specimen of Atys probably belonging to this
species, but in too bad condition for identification with any cer-
tainty.

A. DARNLEYENSIS Brazier. Unfigured.

Shell elongately oval, rather thin, shining, white, attenuated and
umbilicated at both ends, longitudinally obliquely plicated, strongly
transversely striated at each end, the centre or intermediate space
with fine irregular waved striae, sometimes straight ; outer lip thick-
ened within, nearly straight posteriorly, slightly twisted and pro-
duced ; inner lip at the anterior end forming a thin callous ridge at
the side of the umbilicus, slightly reflected, and ending in a denti-
form plate. Length 6J lines, breadth 3 lines (Bmz.).

Darnley Island, Torres Straits, 30 fathoms.

A. darnleyensis BRAZ., P. L. S. K S. W. ii, p. 85, 1877.

A. CHEVERTI Brazier. Unfigured.

Shell subcylindrical, white, thin, transparent, smooth and inflated
in the middle, transversely striated at both ends, the upper strise
extending nearly to the centre ; aperture narrowly linear, wide be-
low, outer lip slightly twisted and posteriorly produced, inflected
and angled in the centre ; inner lip anteriorly, with a strong fold.
Length 3 lines, breadth H lines (BrazJ).

Darnley Island, Torres Straits, 30 fathoms ; Cape Grcnville,
North East Australia, 20 fathoms.

A. cheverti BRAZ., P. L. S. N. S. W. ii, p. 86, 1877.

This species is like a miniature Atys elongata. Some specimens
have an opaque appearance at the back of the aperture, others very
thin and transparent (Braz.).

A. PULCHRA Brazier. Unfigured.

Shell cylindrical, white, thin (under the lens) longitudinally
closely plicated, and transversely very finely striated, giving the
shell a rugose appearance, very minutely umbilicated at both ends,
aperture rather narrow, wide below ; outer lip thin, reflected inside,
slightly posteriorly produced ; columella with a slight curve, min-
utely expanded and reflected, leaving half the umbilicus covered.
Length 3 lines, breadth IL> lines (Braz.).

Darnley Island, Torres Straits, 30 fathoms.



ATYS. 273

A.pulchra BRAZ., P. L. S. N. S. W. ii, p. 86, 1877.

A pretty little species, having the whole surface of a rugose ap-
pearance, the transverse sculpture being quite distinct. In some
specimens the columella is sometimes straight and not curved.

A. DENS A Brazier. Unfigured.

Small, oval, thick, dirty white shell, finely plicated, strongly
transversely striated ; interstices with finer lines (as seen under the
lens) ; aperture narrow, wide below ; outer lip regularly arched,
posteriorly produced, anteriorly twisted and produced, partly cov-
ering the umbilicus. Length 2 lines, breadth li lines (JBraz.).

Darnley Island, Torres Straits, 30 fathoms.

A. densa BRAZ., P. L. S. N. S. W. ii, p. 86, 1877.
A. DUBIOSA Brazier. Unfigured.

Shell small, oval, white, thin, shining, umbilicated at both ends,
the one at the base the largest, transversely very finely striated at
each end (scarcely visible under the lens), more distinct at the base,
intermediate space smooth, ventricose above the centre ; aperture
narrow, outer lip angled, posteriorly slightly thickened and pro-
duced, below straight ; columella with a single obsolete plait at the
base. Length 2 lines, breadth Ii lines (Braz.}.

Darnley Island, Torres Straits, 30 fathoms.

A. dubiosa BRAZ., P. L. S. N. S. W. ii, p. 86, 1877.

A. M'ANDREWII Smith. Unfigured.

Shell elongate-ovate, truncated above, pellucid, encircled by nu-
merous narrow milky bands, one in the middle wider ; transversely
distantly striated at top and base, the interstice smooth ; vertex ex-
cavated, bounded by an acute margin. Aperture narrow, produced
a little above the vertex, a little dilated and effuse at the base ; lip
thin, inserted in the middle of the vertex and sinuated there ; colu-
mella short, thickened, hardly twisted ; umbilical region slightly
perforated. Alt. 5, diam. 2* mill. (&).

ancerote, Canaries.

A. m'andreivii E. A. S., Ann. Mag. N. H. (4), ix, p. 346.

It is at once recognized by the numerous lacteous bands upon a
pellucid ground.

A. CANARIENSIS Smith. Unfigured.

Shell ovate, white, pellucid, striated with irregular growth lines,
and transversely deeply striated above and below, lightly so in the



274 ATYS.

middle ; vertex depressed ; aperture moderately narrow above, pro-
duced a little above the vertex, dilated somewhat toward the base ;
lip thin, thickened toward the middle of the vertex ; columella ar-
cuate, a little reflexed ; umbilical region distinctly perforated.
Alt. 7, diam. 4 mill. (&).

Teneriffe, Canary Is.

A. canariensis E. A. S., Ann. Mag. N. H. (4), ix, p. 346.

Of the form of the young state of A. naucum; but the striae are
less distinct and not so far apart ; also very like caribaea D'Orb.,
but rather broader ($.).

A. CARIB^A Orbigny. PI. 48, fig. 12 ; PI. 28, figs. 33, 34.

Shell oval, oblong, thin, fragile, smooth, attenuated and trans-
versely striated at both ends ; spire entirely concealed, marked by
an imperforate umbilical depression ; aperture narrow, a little arcu-
ate, wider in front ; columella acute, a little separated by an umbil-
ical depression. Color uniform white. Alt. 5, diam. 2 mill. (Orb.).
Martinique, Jamaica, Guadeloupe, St. Thomas, Cuba.

Bidla caribcua ORB., Moll. Cuba, i, p. 127, pi. 4, f. 21-24.

Orbigny's description and figure, given above, are not good. The
species is better represented by fig. 12 of pi. 48.

The shell is oblong, varying somewhat in length, somewhat more
compressed above than below, marked by widely spaced spiral
grooves above and below, these grooves becoming closer and deeper
toward the ends. From the center of the narrow, concave vertex
rises the distinctly plicate lip. The columella is vertical, thickened
but not toothed in the middle, the edge reflexed, partly concealing
the narrow but distinct umbilicus. Alt. 10, diam. nearly 5 mill.

Not having seen the types of the two species following, I am un-
able to say whether they are forms of this one or deserving of spe-
cific rank.

A. GUILDINII Sowerby. PI. 28, fig. 46.

Shell ovate, thin, dull grayish-white, attenuated posteriorly, spir-
ally striated near the ends, slightly longitudinally wrinkled, ven-
tricose below the centre, slightly umbilicated at each end ; outer lip
elevated above ; subacuminated, inflected ; columella thin, rather
straight (Sowb.).

This species is one of the very few in the genus Atys which pre-
sents the character of possessing longitudinal wrinkles or stride

(Sowb.).

St. Vincent, West Indies.



ATYS. 275

A. guildinii SOWB., Conch. Icon, xvii, pi. 5, f. 26.

Seems more pyriform than A. caribcea. Sowerby probably in-
tended the name as an allusion to that clear-seeing pioneer, GUILD-
ING ; but in this case, as in so many others throughout his mono-
graph, the performance fell short of the good intention.

A. SPECIOSA A. Adams. PI. 28, fig. 42.

Shell oval, perforated, posteriorly narrowed and subtruncated,
anteriorly rounded and ventricose, white, semiopaque, shining, lon-
gitudinally superiorly strongly striated, inferior strise evanescent,
transversely striated at both ends ; outer lip thickened within, pos-
teriorly twisted, with a single plait ; inner lip reflex ed, anteriorly
semiplicated (J.d.).

Habitat unknown.

B. (A.) speciosa A. AD., Thes. p. 587, pi. 125, f. 122. SOWB., C.
Icon. t. 3, f. 14.

A. RIISEANA Dunker. Unfigured.

Allied to Bulla cylindrica Helbl., but much smaller. Alt. 10,
diam. 5 mill. (Morch).

St. Thomas (Riise, Ravn.) ; St. Martin ; New Providence ; Trini-
dad ; Ancfuilla ; Porto Plata (Krebs).

Atys riiseana Dkr., JffSS., MORCH., Mai. Bl. xxii, p. 173.

This does not seem to be different from A. caribcea.
A. SANDERSONI Dall. PL 28, fig. 47.

Shell small, thin, fragile, polished, translucent-white, with the
aperture longer than the axis of the shell, slender, elongated oval
with the posterior fourth bevelled off slightly ; transverse sculpture
solely of delicate evanescent lines of growth, sometimes lost in the
general polish of the surface ; spiral sculpture of about a dozen in-
cised lines near either extremity, more crowded toward the tips and
obsolete toward the middle of the shell, reticulating the lines of
growth when the latter are present, but delicate, extremely fine,
and not puncticulate ; posterior apex a rather deep funiculate pit,
from the center of which rises the margin of the aperture, which is
here slightly reflected, extends behind the summit of the body and
suddenly curves forward, leaving a very narrow aperture, which is
produced into a rounded point in front, then sharply recurved and
reflected to a point where the reflected part loses itself in the thin
callus on the body within the aperture ; the anterior reflection is



276 ATYS.

sometimes closely appressed and sometimes loose with a chink be-
hind it, but there is no anterior pit ; the shell is more slender for-
ward than behind, the bevelling is more marked in some specimens
than in others a fragment from off Havana, if conspecific, as seems
likely, indicates that it reaches a much larger size than the de-
scribed specimens. Lon. of shell and aperture, 6'5. Max. lat. of
shell, 3'4, of aperture 1'75 mill. ; lat. of aperture 0'5 mill. (Dull).

Off Bahia Honda, Cuba, 220 fms. ; Near Santa Cruz, 38 fms.
Atys f sandersoni DALL., Bull. M. C. Z. ix, p. 99, 1881 ; Blake
Gastr. p. 54, pi. 17, f. 7.

A. CAST A Carpenter. Unfigurcd.

Shell elongated, thin, subdiaphanous. whitish ; a little more swol-
len anteriorly ; spire concealed, lacunate, in adult shells hardly
umbilicated ; columella a little intorted, effuse ; umbilicus small ;
lip produced posteriorly, obtusely angulated ; entire surface subtly
spirally striatulate. Alt. .4, diam. '18 inch (Cpr.~).

Cape St. Lucas.

f Atys casta CPU., Ann. Mag. N. H. (3), xiii, p. 314, 1864 ; Moll.
Western N. A. p. 104, 212.

On the confines of the genus related to Cylichna ( Cpr.\

Subgenus DINIA H. & A. Ads., 1854.

A. DENTIFERA A. Adams. PI. 27, fig. 81.

Shell ovoid, posteriorly subtruncated, anteriorly produced, horny,,
pellucid, longitudinally sulcated ; outer lip simple, acute ; inner lip
anteriorly strongly truncated, ending in a dentiform plate (Ad.*).

Lord Hood's Island (Cuming) ; Suez (Cooke) ; Mauritius (Mart.);
Levuka, Fiji (Challenger).

Sulla (Atys') dentifera AD., Thes. p. 588, pi. 125, f. 124. A. den-
tifera SOWB., C. Icon. t. 2, f. 13. COOKE, Ann. Mag. N. H. (5),
xvii, p. 133. MARTENS, Meeres-fauna Maurit. p. 303. Atys (Di-
nw) dentifera ADS., Genera, ii, p. 21. WATSON, Chall. Kep. p.
641.
A. MONODONTA A. Adams. PL 28, fig. 17.

Shell subcylindrical, posteriorly subtruncated, anteriorly pro-
duced, solid, opaque, longitudinally grooved ; outer lip iuflexed in
the middle ; inner lip strongly truncated anteriorly, and ending in

a dentiform plate (Ad.').

Shores of Borneo (Cuming).



ATYS. 277

B. (A.} monodonta A. AD., Thes. p. 588, pi. 125, f. 123. SOWB.,
Conch. Icon. pi. 2, f. 12.

A. MIRANDA Smith. Unfigured.

Shell elongate-ovate, pellucid, transversely delicately striated and
with irregular growth lines ; vertex depressed, perforated in the
middle, whence the outer lip rises. Aperture very narrow above,
rising little above the vertex, sensibly dilated and effuse toward the
base ; columella very short, arcuate, abruptly truncated (as in the
genus Achatina). Alt. 10, diam. 4 mill. (&)

Gulf of Suez.

A. miranda E. A. S., Ann. Mag. N. H. (4), ix,p. 347.

R. JEFFREYSI Weinkauff. PL 59, figs. 1, 2.

The obese-cylindrical shell is truncated above and below, nar-
rowly umbilicated above ; under the lens fine stride are visible on
the upper and lower parts, becoming indistinct in the middle. The
aperture is narrow, the margin projecting above, scarcely arcuate,
and very little dilated below ; columella but little thickened. The
shell is thin, translucent, yellow-greenish, smooth and covered with
very fine growth strise. Alt. 8, diam. 3J mill. (Weink.}.

Piedmont Coast; Sicily; Algeria; Provence.

Bulla ovulata Broc., JEFFREYS, Ann. Mag. N. H. (2), xvii, p.
188, pi. 2, f. 18, 19, 1856. Not B. ovulata Brocchi, Conch. Foss.
Subapp., 1814. Cylichna jeffreysi WEINK., Journ. de Conch, xiv,
1866, p. 238 ; Conch, des Mittlm. ii, p. 199. Roxanielhi jeffreysi
MONTS., Nom. Gen. e Spec. p. 144.

R. BROCCHII Michelotti. PL 59, fig. 3 ; pi. 28, fig. 45.

Shell cylindric-oblong, hyaline, sculptured with very fine spiral
striae, invisible to the naked eye ; apex obtuse, umbilicated ; colu-
mella obsoletely uniplicate below (PhiL~).

Alt. 5 lines, diam. slightly less than 2 (Brocchi).

Sicilian Coast (Phil.) ; Adria-Zara (Sandri) ; Algeria (Weink.).

Bulla ovulata BROCCHI, Conch. Foss. Subapp. p. 277, pi. 1, f. 8
(not B. ovulata Lam., Ann. du Mus. 1801). A. AD., Thes. Conch,
ii, p. 586, pi. 125, f. 118. PHIL., Enum. Moll. Sicil. i, p. 122. B.
brocchii MICH., Foss. Mioc. de Fit., p. 151. Cylichna brocchii
WEINK., Conch, des Mittelm. ii, p. 200.

The figure on pi. 59 is copied from the original illustration. Fig.
45 of pi. 28 is from Sowerby. See Weinkauff for references to the
pakeontological literature of the species.
19



278 ATYS.

A. DIAPHANA Aradas. PL 32, figs. 29, 30.

Shell ovate, turgid, very shining, hyaline, smooth in the middle,
sculptured with about 10 flexuous, concentric stride above and be-
low, becoming closer toward each end ; vertex subtruncate, umbili-
cate, thickened at the outer margin. Aperture coarctate in the
middle, patulous and angled above, canaliculate below ; columella
with one fold at base. Alt. nearly one-fifth, width one-tenth inch



JEgean Sea to Italy.

Bulla diapliana ARAB., Catal. Rag., etc., p. 40 (1840). PHIL.,
Enum. Moll. Sicil. ii, p. 215. Weinkauffia diapliana MONTS.,
Nom. Gen. e Spec. p. 145. Bulla turgidula FORBES, Rep. Aeg. In-
vert. p. 188, (1843). Bulla semistriata REQ., Coq. de Corse, p. 42
(1848). Scaphander gibbulus JEFFR., Ann. Mag. N. H. (2), xvii,
1856, p. 188, pi. 2, f. 20, 21. SOWB., Conch. Icon, xviii, f. 8.

According to Monterosato it varies in being more or less swollen.

A. BLAINVILLIANA Recluz. PI. 43, fig. 16.

Shell oblong, subcylindrical, umbilicated, shining, milk-white ; a
little convex in the middle, very smooth, striated at the ends, the
marginal striae deeper, the others sensibly smoother. Aperture ob-
long, wider at base ; columella obtusely one-toothed below. Alt. 10,
diam. 5 mill. (Reel.').

Coast of Provence and of Sicily (Reel.).

mla triticea BLAINV., in Faune Francaise, ou Hist. Nat., Gen.
et Partic. des Anim. que se trouv. en France, Moll., p. 251, pi. 9 A,
f. 4 (good) ; not of Lam. nor Payr. Bulla blainvilliana RECLUZ,
Rev. Zoologique la Soc. Cuvierienne, 1843, p. 10. Cylichna blain-
villeana Reel., LOCARD, Coq. Mar. Fr., p. 27. C.jeffreysi LOCARD,
Proclr., p. 75.

The apex is umbilicated, the umbilicus being a millimetre in
width and rounded within ; the umbilicated end is a little more at-
tenuated than the base of the shell. This species is a real Bulla
and not an Ovula, always of a beautiful whiteness, not red-orange
(Reel.}.

The description of this shell in Faune Francaise is partly hypo-
thetical, the author of that work being under the impression that
his shell was a dead specimen of a red Ovula, described and figured
by Payraudeau. Recluz has also given a very poor description
(translated above), but his citation of Blainville's figure as a good



ATYS. 279

representation of his species, is sufficient to fix its identity beyond
doubt. Compare A. diaphana Arad.

Subgenus ROXANIA Leach, 1847.

For anatomy see under Atys.
A. UTRICULUS Brocchi. PL 28, figs. 28, 29.

Shell oval, with a tendency to become cylindrical, rather solid,
semitransparent and glossy . sculpture, numerous spiral striae or im-
pressed lines, which are visible to the naked eye ; towards each end
they are stronger, and alternately large and small (sometimes two
or three smaller strke between two of the larger size), and they are
throughout closely pnnctate in consequence of the interstices being
crossed by fine longitudinal stride ; the spiral striae are much slighter
in the middle of the shell, which in the young is usually quite
smooth ; epidermis reddish-brown, it is chiefly persistent on the
spiral striae, which are, therefore, darkly lineated ; color pale yel-
lowish or cream color, occasionally milk-white ; spire partly ex-
posed ; crown perforated, and obliquely encircled by a thick angu-
lar rim ; mouth as in H. navicula, but narrower, its length ex-
ceeds that of the spire ; outer lip not much curved in the middle,
nor folding inwards ; it projects a little beyond the crown ; inner
lip slight ; pillar short, thick, and flexuous ; at its base is a rather
strong fold, which makes the lower part of the mouth appear chan-
nelled ; behind the pillar is a small and groove-like umbilicus
G/e/r.). Alt. 12, diam. 7* mill.

Var. oblonga. Smaller, longer in proportion to its breadth, and
more cylindrical (Jejfr.~).

Finmarlc to the Canary Is. ; Mediterranean Sea.

Bulla utrieulus BROCCHI, Conch. Foss. Subap. i, p. 633, pi. 1, f.
6. Bulla utrieulus JEFFR., Brit. Conch, iv, p. 440 ; v, pi. 95, f. 4.
Bulla cranchii LEACH, in Flemings' Brit. An. p. 292. FORBES
& HANLEY, Hist. Brit. Moll, iii, p. 533, pi. 104, f. 8, 9, and pi. VV,



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