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Philip P. (Philip Pearsall) Carpenter.

The mollusks of western North America online

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M. testa curta, laevi, latiore, maxime fornicata ; pallide carnea, epi-
dermide rufo-fusca, rujris increment! et Lncrustatione densissime
pilosa iuduta; umbonibus maximis, spiralibus, antice torsis, per
tres quadrantes totse latitudinis devectis ; area ligamentali curtis-
sima, arcuata; margine dorsali antice nullo, postice longo, arcuato;
margine ventrali recto, vix propter byssum hiante ; postico lato,
antico angusto ; altitudine dorsaliter valde elevata, ventraliter
plane declivi, cuneiformi ; umbonibus trans marginem anticum per
sextantem totius longitudinis excurrentibus : intus, sub umbonibus
excavata ; cicatr. adduct. ant. ventraliter sita. Long. 1*4, lat. *76,
alt. -95.

Hab. Sta. Barbara (Jewett) ; Monterey (Taylor).

160. Pecten (? var.) aquisulcatus.

if. testa P. ventricoso simili, sed tenuiore, minus ventricosa; costis
piuribus angustioribus xx.-xxi. ; interstitiis (prsecipue valva su-
periore) fere sequalibus ; auriculis magis productis, acutis ; sinv
gerrato : testa juu. iiiterstitiis alte iiiscuh>tis. laminis concentricii

280



from the West Coast of North America. 3

crebris, vix extantibus, interstitia, costas auriculasque transeunti-
bus. Long. 3"2, lat. 3'35, alt. 1'5.

Hab. Sta. Barbara (Jewett) ; S. Diego (Cassidy, Newberry,
Cooper}.

Intermediate between tbe tropical P. venlricosus and the
Atlantic P. irradians.

161. 1'ecten '*fiur.icostatus.

P. tes^a anbconvexa, vix requilaoerali ; cas'aneo sen rubido seu elec-
tri'.- * ( 'ii-;ta; costis xi.-xv., validis, angustis, rotundatis ; mter-
sti-.is multo latioribus, subp'ianatis ; tota superficie minutissime
concentrice striata ; auriculis latis, baud sequalibus, lirulis circ. vi.
ornatis ; sinu paucideutato : intus pallidiore, linea cardinis cos-
tata, ad suturas auricularum tuberculosa ; fossa ligameatali curta,
transversim lata. Long. 1'7, lat. T84, alt. *56.

Hab. Sta. Barbara (Jewett)} Sta. Barbara Island (Cooper).

Pecten (? var.) squarrosus. (Page 536.)

P testa orbiculari, eequilaterali, rubida, albido maculata ; valva dextra
convexa ; costis xviii., sequalibus, testa jun. approximatis, testa
adulta interstitiis sequalibus ; costis et interstitiis regulariter un-
datis, striis crebris squamosis r;;diantibus ubioue ornata ; auriculis
magnis, latissimis, subaequalibus ; antica anguste fissata, serrate,
postica sinuata ; auriculis anibabus et regione contigua scabrose
striatis : intus alba, linea cardinal! alte sulcata. Long. T&l',
lat. 179, alt. '9.

Hab. " Sta. Barbara," teste Jewett.

Kesembles a sbell in Mus. Cuming., marked " exasperatus,
var.," but does not agree witb the diagnosis of that species.
All Col. Jewett's valves were dextral. The locality needs con-
firmation.

183. Volvula cylindrica.

V. testa cylindracea, alba, nitente, striis spiralibus distantibus cincta ;
raedio planato, marginibus fere parallelis ; antice satis effusa,
postice subito angustata ; canali brevissimo ; labro acuto ; labio
indistincto ; plica columellari parva, valde declivi. Long. 1 7,
iat. -07.

Hab. Sta. Barbara (Jewett).

265. Phasianella (? compta, var.) punctulata.

P. testa P. comptce simili, sed elatiore; suturis impressis ; anfractibus
tumentibus ; omriino minutissime fusco punctata ; columella lacn-
pat3. Long. '24, long. spir. *12, lat. '14, div. 50.

Hab. S. Diego (Jewett).

281



4 Dr. P. P. Carpenter on new Forms of Mollusca

265 b. Phasianella (? compta, var.) pulloides.

P. testa P. pullo simillima; solicla, compacta, spira breviore ; snfiiris
distinctis. Long. '2, long. spir. *1, lat. '13, div. 55.

Hob. Sta. Barbara (Jewett) ; Monterey, 20 fathoms (State
Coll. no. 353). Smaller var., 8-10 fathoms, Catalina Island
(Cooper).

265 c. Phasianella (? compta, var.) elatior.

P. testa perparva ; spira elongata, ut in P. pullo picta ; anfractibui
subplanatis ; suturis haud impressis ; columella hand lacuiiaia.
Long. -19, long. spir. '12, lat. '11, div. 40.

Hab. Sta. Barbara (Jewett).

P. compta, with a large proportion of the small shells of the
genus, is included under P.pullus in Mr. Reeve's monograph.
In so difficult a tribe, it is judged better to name the distinct
forms, and those from separated localities, until more is known.

276. Trochiscus convexus.

T. testa parva, suhelevata, purpureo-fusca, tenuiter sculpta; anfr. nucl.
? sinistralibus, vertice quasi decollate ; norm, iv., convexis, suturis
impressis; obtusissime bicarinatis, striolis confertissimis, nmiitnis,
subobsoletis cinctis ; umbilico majore, costis duabus cincto, quaruin
interior acuta, exterior rotundata, crenata ; apertura ciiculari.
Long. -15, long. spir. '06, lat. -15, div. 90.

Hab. Monterey (Jewett).

The nuclear whorls in this unique little shell and in the typi-
cal species appear sinistral, as in Phoridse and Solariadse. Tiie
operculum also resembles that of Solarium rather than of Tro-
chus. The genus may prove to belong to the Proboscidifer>,
notwithstanding its nacreous texture.

317. Hipponyx lumens.

H. testa normaliter fornicata, rotundata, albida ; epidermide rngnlosn,
interstitiis pilulosa ; vertice nucleoso nautiloideo, Isevi, parurri tu-
mente, apice celato, interdum persistente ; dein rapidissiine au-
gente, expansa, undique regulariter arcuata ; liris acutis, subele-
vatis, distantibus, spiralibus, aliis intercalantibus ; lineis incre-
menti minoribus decussantibus ; margine acuto ; apertura ple-
rurnque rotundata : cicatrice musculari a margine parum reniota,
regione capitis valde interrupta. Long. 7, lat. *46, alt. *33, div. 9U.

Hab. Sta. Barbara (Jewett); S. Pedro (Cooper).

. *subrufa" + " Capulus, 213," Brit. Assoc. Rep. ]857,

282



from the West Coast of North America. 5

3296. Bittium (?var.) esuriens.

B. testa B. filoso sirnili, sed multo minore, graciliore, interdum vald.
attenuata ; sculptura testae jun. ut in B. filoso, testae adultae sub
obsoleta; interstitiis hand insculptis. Long. '3, long. spir. "21
lat. -11, div. 25.

Hob. Sta. Barbara (Jewett} ; Neeah Bay (Swan) ; Monterey
(Cooper).

334. Bittium fastigiatum.

B. testa parva, gracili, pallide rufo-cinerea, marginibus spirae vix
excurvatis ; anfr. nucl. iii., Isevibus, tumidis, apice acuto; nqpm. ix.,
planatis, sutaris alte impressis ; anfr. primis iii. carinatis, postea
costis radiantibus circ. xiii., obtusis, satis extantibus, ad suturas
interrupts, interstitiis undatis, liris spiralibus iv. in spira se mori-
strantibus, costas undatim superantibus, quarum antica in testa
jun. plerumque extat; anfr. ultimo parum contracto, basi elongata,
liris spiralibus vi. contiguis ornata ; apertura gibbosa ; labro
acuto, interdum varicoso, antice angulatim emarginato ; labio
tenui. Long. *25, long. spir. *19, lat. *U9, div. 20.

Hob. Sta. Barbara (Jewett}.

Genus AMPHITHALAMUS*.

Testa Rissoidea, nucleo magno ; apertura labio producto, labro
subpostice juricto, subito in adulta contracto.

355. Amphithalamus inclusus.

A. testa minuta, lata, solidiore, pallide rufo-fusca ; vertice mamillato;
anfr. nucl. uno et dimidio, quoad magnitudinem perrnagnis, mi-
nutissime et confertissime spiraliter et radiatim striolatis ; anfr.
norm, iii., lsevibus,subplanatis,suturis impressis ; basi subangulata ;
costa peripherica rotundata, baud extante, interdum in spira se
monstrante; costa altera circa regionem pseudo-umbilicarem ; labro
acuto, baud contracto : labio testa adolescente normali, dein a
pariete separata, sinum posticum suturam versus formante, t. adulta
valde separata, regionem quasi umbilicarem magnam formante; ad
labrum subito fere perpendiculariter, subpostice juncto : operculr
tenuissimo. Long. '04, long. spir. '02, lat. '03, div. 60.

Hob. Sta. Barbara (Jewett}', S. Diego (Cooper}.

This very remarkable little shell bears the same relation to
Rissoa that Stoastoma does to Helicina. The peritreme resem-
bles a figure 5 inverted, as on the face of the type. In the dis-
proportionate size of the nuclear whorls it resembles Vitrinella.

373. Drillia mast a.

D. testa acuminata, laevi, dense olivaceo-fusca, epidermide leevi ad-
hserente induta ; anfr. nucleosis ?... (decollatis); norm, viii., parum

* Th. dfj.(f>\, 8d\ap,os, having a chamber on both sides.

283



6 Dr. P. P. Carpenter on new Forms of Mollusca

excurvatis, suturis parum distinctis ; testa adolescente costis radi-
autibus circ. x., subobsoletis, elongatis, arcuatis, sinum versus iu-
terruptis, postice nodosis ; anfr. ult. sculptura nulla ; apertura
elongata ; canali brevi, apei to ; colurnella recta ; labio tenui ;
labro acuto, suturam versus sinuato, sinu parvo, expanse; operculo
norrnali. Long. W, long. spir. '65, lat. '3(>, div. 27.

Hub. Sta. Barbara (Jewett) ; S. Pedro (Cooper).

386. Mitromorpha filosa.

M. tesa parva, solidiore, atro-purpurea, subconiformi, antice et pos-
tice subsequaliter tereti ; anfr. nucl. ii., albis, isevibus, apice
mamillato ; norm, iv., planatis, suturis baud distinctis ; omnino
eequaliter spiraliter lirulata ; lirulis acutioribus, in spira iv., anfr.
ult. circ. xx., interstitiis majoribus ; apertura lineata ; labro parum
inflexo, rotundato, postice vix sinuato, intus circ. xii.-dentato ;
labio inconspicuo; columella arcuatim truncata. Long. '26,
long. spir. -1, lat. -12, div. 45.

Hab. Sta. Barbara (Jewett} ; Lower California (teste Trick, in
Mus. Cuming.).

= Waphnelta filosa, Brit. Assoc. Rep. 1863, p. 658, notef.

Mr. A. Adams obtained two similar species from Japan ; and
as the shells do not rank satisfactorily under any established
group, he proposes the above genus for their reception. M. Crosse
suggests that Columbella dormitor, Sby._, may be congeneric.

Mangelia variegata.

M. testa valde attenuata, tenui, parva, pallide carnea, rufo-fusco
normaliter bizonata, interdum unizonata, sen zonis interruptis ;
vertice nucleoso conspicuo, anfr. uno et dimidio, apice mamillato ;
anfr. norm, vi., subrotundatis, suturis valde impressis ; costis
radiantibus ix., angustis ; costulis spiralibus crebris, validioribus,
in spira circ. x., costas superantibus ; apertura valde elongata;
canali brevi, aperto ; labro tenui, juxta suturam conspicue arcuate;
labio tenui. Long. '31, long. spir. '17, lat. ! poll., div. 22.

Variat costis crebrioribus, sculptura minus expressa.

Hab. Sta. Barbara (Jewett}.

Mangelia (? variegata, var.) nitens.

J5/. testa M. variegata simili, sed nitentiore, fascia alba et altera
rufo-fusca attingente spiram asceudentibus. Long. '25, long,
gpir, -15, lat. -08, div. 20.

Hab. Sta. Barbara (Jewett}, rare.

Mangelia angulata.

M. testa parva, rufo-purpurea, vix gracili, epidermide tenui fugaci ;
anfr. nucl. iii., helicoideis, primuni Isevibus, dein cahcellatis, apice

284



from the West Coast of North America. 7

mamillato ; anfr. norm, iv., convexis, suturis impressis, in medio
spirse obtusangulatis ; costis radiantibus circ. xii., acutioribus ; cos-
tula spiral! circa angulum, inter costas subobsoleta ; tota superficie
tenuiter spiraliter crebrisulcata, sulculis sub lente siepius bifidis ;
apertura pyriformi, canali longiore, recto, aperto ; labro acuto,
postice conspicue sinuato ; columella baud contorta ; labro obso-
lete. Long. -35, long, spir, '18, lat. '13, div. 30.

Hab. Sta. Barbara (Jewett).

Myurella simplex.

M. testa rufo-cinerea, miuore, minus tereti, epidermide tenui ;
anfr. xii., planatis ; fascia suturali valida, nodosa, tuberculis ovali-
bus crebris validioribus (anfr. penult, circa xv.) ornata ; testa
adolescente costulis radiantibus, postea evanescentibus ; striolis
antice et postice spiralibus, circa peripheriam ssepe obsoletis ;
basi rotundata ; canali brevissimo, alte emarginato ; carina supra
canalem acuta, columellnm plicante ; labro acuto, vix undato.
Long. 1-03, long. spir. '76, lat. '27, div. 20.

Variat tuberculis subobsoletis.

Hab. Sta. Barbara (Jewett) ; S.Pedro (Cooper).

Odostomia inflata.

0. te.*i majore, tenui, pallide cinerea, epidermide cinerea induta;
vert. nucl. subito immerso ; anfr. norm, iv., rapidissime augenti-
bus, subplanatis, suturis impressis; tota superficie minutissime et
confertissime spiraliter striolata ; umbilico nullo ; basi et apertura
valde elongatis ; labro acuto ; labio tenuissimo ; plica acuta, trans-
versa, parietem attingente ; columella valde arcuata, antice effusa.
Long. -26, long. spir. -09, lat. '14, div. 60.

Variat spira elatiore. Long. '24, long. spir. "11, lat. *13, div. 45.

Variat quoque striolis subobsoletis.

Hab. Sta. Barbara (Jewett) ; Farraleone Islands, in cavities, on
Haliotis (teste R. D. Darbishire) ; near San Francisco (Rowell) ;
Neeah Bay (Swan).

Chemnitzia crebrifilata.

C. testa satis tereti, subalbida, baud regulari ; anfr. nucl. ii., beli-
coideis, decliviter sitis, margines spirse parum excurvatos paullum
superaritibus ; norm, viii., quorum primi subrotundati, ultimi vix
planati ; suturis valde distinctis ; cost. rad. circ. xxiv., subrectis,
acutioribus, angustis, interdum attingevitibus, anfr. ultimo cre-
brioribus minus expressis, circa basim prolongatam baud subito
evanescentibus; lirulis spiralibus, in spira circ. viii., rotundatis,
expressis, anfr. ult. supra costas subnodulosis, circa basim crebri-
oribus ; peritremate continuo ; columella vix torta, baud plicata ;
labio distincto.. Long. *22, long. spir. *17, lat. '07, div. 18.

Hab. Sta. Barbara, 1 specimen (Jewett).

285



8 Dr. P. P. Carpenter on new Forms of Mollusca

403 b. Chemnitzia (ttorquata, var.) stylina.

C. testa C. torquatte simili, sed valde teretiore, gracillima, interdum
subdiaphana ; anfr. nucl. ii., decliviter sitis, margines spirse fere
yiarallelos vix superantibus ; norm, xii., angustis, subplanatis, su~
turis distinctis; costis radiantibus circ. xxiii., latis, declivibus,
testa juniore continuis, adulta fascia baud sculpta suprasu^urali
eeparatis ; interstitiis parvis, baud sculptis ; basi rotundata, baud
sculpta ; columella parum torta. Long. '32, long. spir. *27, lat. '8,
div. 10.
Hob. Sta. Barbara (Jewetf); Monterey (Cooler).

Chemnitzia Virgo.

C. testa parva, alba, gracili, stylina ; anfr. nucl. ii., decliviter sitis,
margines spirse subparallelos baud superantibus ; norm, viii.,
subrotundatis, suturis distinctis ; costulis radiantibus circ. xviii.,
angustis, acutioribus, ssepe attingentibus, circa peripheriam baud
subito evanidis, interstitiis subsequalibus alte spiraliter sulcatis,
sulcis circ. viii., latera costarum crenulantibus, costas baud super-
antibus; basi valde rotundata, curta, baud sculpta; axi lacuuato;
peritremate vix continue; columella recta. Long. "18, long,
spir. -14, lat. -05, div. 12.

Bab. "Sta. Barbara," 1 specimen (Jewett).

Dunkeria laminata.

D. testa satis elevata, rufo-fusca, fasciis pallidioribus interdum cincta;
anfr. nucl. ii., helicoideis, valde decliviter sitis, margines spirse
subrectos baud superantibus ; norm, viii., subrotundatis, suturis
impressis ; costis spiralibus rotundatis, in spira iv., aliisque sutu-
ralibus vix rotundatis, interstitiis minoribus impressis ; super eas
laminis radiantibus acutioribus circ. xxx., circa basim rotundatam
tenuiter continuis ; liris spiralibus basalibus circ. viii., obtusis, colu-
mellam versus subflexuosam obsoletis ; peritremate continuo ; labio
appresso. Long. "25, long. spir. "18, lat. '07, div. 20.

Hab. Sta. Barbara (Jewett} ; San Diego (Cooper).
This beautiful Fenelloid species may be regarded as tbe type
of the group Dunkeria.

Eulima Thersites.

E. testa parva, curtissima, albida, arcuata, valde distorta ; margini-
bus spirse dextro subrecto, sinistro valde excurvato ; anfr. nucl.
?. . (decollatis) ; norm, vi., Isevibus, subplanatis, suturis distinctis ;
basi valde arcuata ; apertura subovali, dextrorsum producta ; peri-
tremate continuo, valde calloso ; labro sinuato. Long. '21, long.
spir. -13, lat. '09, div. 40.

Hab. Sta. Barbara, 1 specimen (Jewett).
Preeminent for aberration among tbe distorted Eulimidae.
A second specimen occurred from an uncertain source.

286



from the West Coast of North America.

Opalia bullata.

0. testa minore, alba, subdiaphana, turrita, gracili ; marginibus spirse
subrectis ; tota superficie minutissime et creberrime spiraliter
striolata ; vertiee nucleoso declivi, celato ; dein anfr. ii., globosis,
radiatim baud sculptis ; dein v. normalibus, pianatis, suturis vix
impressis; lirulis radiantil)us circ. xxvi., baud nisi in anfr. primis
exj)ressis, circa basim irregu.ariter rotundatam ad axim continuis ;
serie bullularum suturalium anfr. primis e lirulis extantibus for-
mata, postea lirulis baud convenientibus, anfr. penult, circ. xvii.,
pianatis, super suturas parieti appressis, interstitiis baud infossis ;
basi subangulata, baud costata; apertura subovali, sinistrorsum
subplanata ; peritremate continue, calloso ; labro baud sinuato.
Long. -3, long. spir. -21, lat. '09, div. 20.

Hub. Sta. Barbara, one specimen (Jewett).

422. Cerithiopsis purpurea.

C. testa compacta, baud gracili, marginibus spirse panim excurvatis;
purpurea seu fusco-purpurea, cirta periphenam pallidiore ; anfr.
nucl. ? ii., leevibus ; norm, vii., pianatis, suturis impressis ; serie-
bus iii. noclulorum minorum supra costulas spirales minores, ad
intersectiones costularum radiantium circ. xxiii., lineis fere rectis,
ad suturas interruptis, spiram asceiidentium sitis ; interstitiis im-
pressis, quadratis ; costulis suturalibus ii. baud nodulosis ; basi
rotundata, antice lirulis paucis expressis inter eas et costulas su-
turales vix sculpta ; apertura subquadrata ; columella torta, emar-
ginata. Long. -29, long. spir. '19, lat. -1, div. 20.

Hab. Sta. Barbara (Jewett); Monterey, San Diego (Cooper).

423. Cerithiopsis fortior.

C. testa C.purpurece simili, sed sculptura multo fortiore, basi pallida;
seriebus nodulorum spiralibus testa adolescente ii., postea iii. ; costis
radiantibus circ. xiii., interstitiis magnis ; costis suturalibus validis,
subnodosis ; costa basali valida. Long. *3, long. spir. *2, lat. *11,
div. 26.

Hab. Sta. Barbara, 1 specimen (Jewett).

439. Marginella subtrigona.

M. testa M . Jewettii simili, sed multo curtiore, latiore ; antice valde
angustata, postice valde tumenie ; labro postice minus prolongato;
pbcis iv., validioribus, parietali una. Long. *14, long. spir. '01,
lat. -11, div. 130.

Hab. Sta. Barbara (Jewett).

440. Marginella regutaris.

M. testa M. Jewettii simili, sed multo minore, paullum angustiore ;
tenui, nitidissima, crystallina, oi/mino diaphana ; labio magis cal-
loso. Long. -13, long. spir. -01, lat. -09, div. 120.

Hab. Sta. Barbara (Jewett) ; coast of California south from

287



10 Dr. P. P. Carpenter on new Forms of Mollu?ca

Monterey, beach to 20 fathoms; Catalina Island, 10-0 fa-
thoms, State Coll. no. 398 a (Cooper).

453. Amy da tuber osa.

A. testa A. minori simillima, sed vertice nucleoso tuberoso ; anfr. iv.,
tumidis, rapide augentibus ; apice minimo, margines spirse rectos
parum superante, interdum subdecliviter sito ; testa adulta inter-
dum unicolore, livida seu aurantiaca ; plerumque albida, rufo-iusiw
vne picta, seu maculata, seu nebulosa, seu strigata strigis radi-
antibus seu flexuosis, seu varie penicillata, ssepe fascia tesscllaia
subsuturali ; anfract. norm, v., planatis, suturis distinctis ; basi
subangulata ; apertura pyriformi, canali satis prolongato, arcuato ;
labro intus acuto, deorsum quasi tumidiore, postice sinuato, intus
circ. octodentato ; labio parum conspicuo, vix rugulato ; columella
torta, axi antice striato ; superficie laevi, seu interdum minutissime
sub lente radiatim striolata ; epidermide cornea, tenui, subdia-
phana, spiraliter sub lente minutissime striolata : operculo Nas^se-
formi, parvo, marginibus irregulariter serratis, cicatrice bilobata.
Long. -32, long. spir. -18, lat. -14, div. 30.

Hab. Sta. Barbara, recent and fossil (Jewett) ; coast of Cali-
fornia north to Monterey; Catalina Island, 8-10 fathoms
(Cooper).

As this belongs to a group of closely allied species of Nassoid
Columbellse, a minute diagnosis is given. The fossil specimens
are larger, and have the remarkable nucleus more perfect, than any
of the recent shells yet seen. In appearance it scarcely differs
from the small variety of the Mediterranean A. minor, Scac.;
but that (with A. corniculata) has a Chrysodomoid nucleus, the
Californiaa an Alaboid.

t Anachis penicillata.

I A. testa parva, Metuloidea, turrita, albida, rufo-fusco plus minusve
penicillata ; anfr. nucleosis ii., tumidis, helicoideis, apice mamil-
lato ; norm, vi., tumidis, suturis valde impressis ; costis radianti-
bus circ. xii., angustis, expressis ; lirulis spiralibus extantibus,
in spira plerumque vi. supra costas transeuntibus ; apertura pyri-
formi, antice etfusa ; labro postice sinuato. Long. '21, long.
spir. -13, lat. '08, div. 25.

Hab. Sta. Barbara (Jewett) ; S. Diego, Catalina Island, shore
to 10 fathoms (Cooper).

Neither of the specimens sent is quite mature. The mouth
is that of an adolescent Anachis, but the sculpture is Metuloid.

Siphonalia fuscotincta.

S. testa minima, turrita, albida, apicem versus fusco tincta ; anfr.
nucl. ii., compactis, sub planatis, apice mamillato ; norm, iv., con-
vexis, suturis impressis ; costis radiantibns rotundatis, tumentibus,
basim versus evanidis, interstitiis undulatis, subsequantibus ; lirulis

288



from the West Coast of North America. 11

crebris spiralibus, costas superantibus ; apertura pyriformi, in
canalem brevem apertum contortum producta; labro acuto; la-
bio baud conspicuo; columella canalem versus valde contorta.
Long. -17, long. spir. !, lat. -08, div. 32.

Hab. Sta. Barbara (Jewett).

The unique specimen is like a minute edition of Siphonalia
Kellettii, but does not accord with the young of that or of any
other species known in the region. It is probably not mature.
19 289



L.



DIAGNOSES

NEW FORMS OF MOLLUSCA,

COLLECTED BY COL. E. JEWETT

ON THE

WEST TROPICAL SHORES OF NORTH AMERICA.

BY
PHILIP P. CAEPENTEE, B.A., Pn.D.



From the Annals and Magazine of Natural History. Third Series, Vol.
XV., pp. 399400, May, 1865.



(291)



DIAGNOSES
OF

NEW FORMS OF MOLLUSCS

COLLECTED BY COL. E. JEWETT

ON

THE WEST TROPICAL SHORES OF NORTH AMERICA;

BY

PHILIP P. CARPENTER, B.A., Pn.D.



Rissoina expansa*

R. testa magna, lata, tenuisculpta, alba, nitente, subdiaphana;
marginibus spirae parum excurvatis ; anfr. nucl. Isevibus, vertice
mamillato ; norm, v., planatis, suturis distinctis ; costulis radianti-
bus circ. xxiv., obtusis, baud extantibus, interstitia sequantibus,
peripheriam versus evanidis ; circa basim productam striis spirali-
bus expressis ; medio laevi ; apertura valde expansa, semilunata ;
labro subantice producto, varicoso, antice et postice alte sinuato ;
labio calloso. Long. '35, long. spir. '18, lat, '17 poll., div. 30.

Hab. Mazatlan (teste Jewett].

This fine species is the largest known in the fauna. It most
resembles R. infrequens, C. B. Ad., which was described from a
dead shell.

Mangelia hamata.

M. testa carneo-aurantiaca, satis turrita, margjnibus spirse excurvatis 5
anfr. nucl. ii. globosis, tenuissime cancellatis, apice mamillato ; norm,
vi . , subelongatis, in spira tumentibus, subangulatis, suturis impressis ;
costis radiantibus x.-xii., acutioribus, validis, circa basim pro-
longatam continuis ; interstitiis concavis ; lirulis spiralibus filosis,
distantibus, supra costas transeuntibus, in spira iii.-iv. ; apertura
subelongata, quasi hamata, intus Isevi, intense colorata: iabro

293



Dr. P. P. Carpenter on new Forms of Mollusca. 13

acuto, dorsaliter varicose, posticevalde sinuato. Long. *24, long.

spir. -13, lat. -1, div. 25.

Hab. Panama (teste Jewett).

This very beautiful species is easily recognized by the varicose
lip, sloping off to a sharp edge ; by the deeply cut posterior
notch, giving the smooth mouth a hooked appearance ; by the
sharp ridges, traversed by distant spiral threads ; and by the
flesh-tinted orange colour.

Mangelia cerea.

M. testa M. kamata simili, sed textura cerea, aurantiaca, graciliore,
anfractibus tumidioribus, baud angulatis; anfr. nucl. leevibus;
normalibus v., costis radiantibus baud acutis, interstitia sequan-
tibus ; liris spiralibus validioribus, baud filosis, supra costas nodu-
losis, in interstitiis subobsoletis ; apertura, testa adulta, ? . . . .
Long. -25, long. spir. '14, lat. !, div. 28.

Variat testa rufo-fusca.

Hab. Panama (teste Jewel t).

Col. Jewett's unique specimen is not mature. It is distin-
guished from M. hamata by the smooth nucleus, waxen texture,
rounder whorls, more equal distribution of the contour between
ribs and interstices, and especially by the spiral sculpture, which
is faint in the hollows, but nodulose on the ribs. Mr. Cuming



Online LibraryPhilip P. (Philip Pearsall) CarpenterThe mollusks of western North America → online text (page 34 of 45)