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Philip P. (Philip Pearsall) Carpenter.

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coloured ; white, round margin. Scar kidney-shaped, dark in one
valve, light in the other. A young valve is white, and as pearly as
O. iridescens, M. 211. The species is best known by its tendency
to make a very broad limb in the exterior coloured part, spreading
out into palrnations. A very young specimen, though covered above
with Membraniporce, shows the characteristic corrugations through.
It may stand provisionally as O. panamensis.

381. Ostrea, sp. ind. b. This is probably a variety of O. pana-
mensis, but more coarsely grown, so that there is a smaller limb,
without palmations. Wherever the sculpture appears, there are evi-
dent traces of the peculiar corrugations. The inside has the same
characters, both of hinge, colour, iridescence, and scar.

382. Ostrea, sp. ind. c. Rather square hinge, without plications ;
one shell with an umbonal cavity. Pearly white. One specimen is
tinted on the scar, which may become coloured in the adult. It is
by no means "pentangular," and is more probably = O. rufa, Gld.,
than 0. columbiensis, M. 213.

383. Ostrea, sp. ind. d. The shells are broader than the Mazatlan
specimens of O. virginica, M. 212, probably from not growing on
twigs. The younger shells are very like O. edulis ; the older ones

198



DR. P. P. CARPENTER ON THE SHELLS OF PANAMA. 25

have hollow umbos. One long shell, first marked e, but altered to d,
is the adult form ; several of the younger shells are doubtful.

384. Ostrea, sp. ind. e. = Ostrea, M. 215. Being a good species,
I propose the name of 0. amara. The Professor's " small var." is
not plicated, and appears to belong to O. conchaphila, M. 214.
[N.B. Additional specimens confirm me in the belief that O. pal-
mula, M. 214 b, is a distinct species.]

385. Spondylus lamarckii, C. B. Ad. = S. calcifer, M. 208.

386. Spondylus, sp. ind. a = Plicatula penicillata, M. 210.

387. Pecten inca=P. ventricosus, Sby., as in errata.

388. Pecten tumbezensis=P. aspersus, Sby., Hani. (? Lam.).

389. Lima angulata. Shells inflated, not gaping.

390. Lima pacifica (=L. arcuata, Sby., Hani.). Young shells,
species uncertain.

391. Avicula 1maryaritifera = Maryaritiphora fimbriata, Dkr.,
M. 204 = M. mazatlanica, Hanl. = Jf. barbata, Rve.

392. Avicula sterna, M. 203. A. libella, Rve., appears to me
the young of this specie*.

393. Perna, sp. ind. a = Isoynomon chemnitziana, M. 205.

394. Perna, sp. ind. b I. chemnitziana, var. Rather more
finely grown, and with less colour, but certainly the same species.
The Professor's Jamaica specimens are labelled " bicolor, Ad."

395. Pinna maura, M. 200.

396. P'rtna tuberculosa. Three of the specimens appear to me
= P. maura, jun. The other may be the same, but is worn nearly
smooth.

397. Mytilus, sp. ind. a. Resembles the young of Modiola bra-
siliensis, but with a few hinge-teeth, as in M. edulis.

398. Lithodomus, sp. ind. a. Most of these specimens are of
Lithophagus aristatus, M. 176 ; one (perhaps two) are L. attenua-
tus, M. 173 (which is found from Lower California to Chili) ; and
one appears to be L. plumula, M. 1 75 ; but they are too young to
decide with confidence.

399. Modiola ? semifusca. These specimens all belong to the M.
brasiliensis, M. 1/1, but are much more like the ordinary Brazilian
specimens than are those from Mazatlan. As compared with the
latter, the Panama shells are more rounded, with stronger posterior
grooving, and with the angular ridge less marked. A similar shell,
undoubtedly from New Zealand, is considered by Mr. Cuming con-
specific.

400-404. Modiola, sp. ind. a, b, c, d, e. I could find no a or e
in the collection; but there were two trays marked/. Tray b M.
capax, M. 170. c contains several specimens of Mytilus multiformis,
M. 168, strongly ribbed variety, perhaps intended for b, no. 401.

199



26 DR. P. P. CARPENTER ON THE SHELLS OF PANAMA.

d contains parts of six specimens, and perhaps should be a, no. 400.
They appear to be a variety of Lithophagus cinnamomens, M. 177,
but with broken shells, &c., agglutinized on the posterior side. /(I)
contains four specimens of M. multiformis, the semigreenish variety
(Maz. Cat. p. 119), and are probably intended for c. /(2) contains
two specimens of the same variety of M. multijormis, in the burrow
of a Lithophagus, and may stand for d or e.

405. Chama buddiana= C. (^.frondosa, var.)/orm'ca, M. 121, 1.
Additional specimens confirm me in regarding this species as distinct
from all varieties offrondosa. The Professor's shells not being very
characteristic, the diagnoses do not exactly accord. The shell stands
as C. buddiana.

406. Chama ? corrugata. The large valve appears a dead reversed
C. (frondosa) mexicana, M. 121, with the teeth perforated by Li-
thophagi. The other may be corrugata, very dead, of sienna-tint,
very pointed dorsally.

407. Chama echinata. These appear to me to be the young, partly
of C. buddiana, but principally of C. mexicana.

408. Nucula elenensisLeda e., M. 199.

409. Nucula exigua, M. 198.

410. Nucula polita=Leda p. With semidiagonal lines.

411. Pectunculus assimilis+P. incequalis, M. 196.

412. Pectunculus Imaculatus. Stet.

413. Area alternata Barbatia a. t M. 188.

414. Area laviculoides appears a young Scapharca.

415. Area emarginata=Scapharca e., M. 187.

416. Area gradata= Barbatia g., M. 194.

417. Arcagrandis, M. 180.

418. Area mutabilis Byssoarca m., M. 190.

419. Area (Byssoarca) pholadiformis. This is simply an elon-
gated form of Barbatia gradata, probably from growing in the hole
of a Lithophagus. The umbos are " flattened " by erosion ; teeth
not "obsolete" under the glass; "ligament concealed" simply by
the compressed and elongated growth.

420. Area reeviana=. Barbatia r.

421. Area reversaNoetia r. t M. 185.

422. Area similis. This is scarcely a variety of A. tuberculosa,
TM. 184. The specimens are dead and oiled, with most of the epi-
dermis abraded.

423. Area solida= Barbatia s., M. 195.

424. Area (Byssoarca) tob ay ensis= Barbatia illota, M. 193.

425. Area tuberculosa t M. 184.

426. Area, sp. ind. a. These little shells approach the Noetia

200



DR. P. P. CARPENTER ON THE SHELLS OF PANAMA. 27

type. Ribs fine, tuberculous, coarse on the angular side. Ligament
very narrow, truncated.

42". Cardita affinis. (Lazaria.}

428. Cardita laticostata=Venericardia I.

429. Cardita radiata. (Lazaria.)

430. Cardium graniferum, M. 134.

431. Cardium obovale=Hemicardia o.

432. Cardium planicostatum, C. B. Ad., not Sby. This looks like
a dead ballast- valve of Hemicardia media ; but it may be H. bian*
gulata.

433. Cardium procerum, M. 125.

434. Cardium senticosum, M. 126.

435. Venus lamathusia Anomalocardia subimbricata, M. 113.

436. Venus discors= Tapes grains, Say, M. 1 1 0. The Professor's
specimens of this species and T. histrionicus are somewhat inter-
mixed.

437. Venus gnidia, M. 101. Dead specimens ; of which one may
possibly be Chione amathusia, M. 102.

438. Venus multicostata. Closely resembling the West Indian
form.

439. Venus pectunculoides= Tapes histrionicus, M. 109.

440. Venus subrugosa=Anomalocardia s. t M. 112.

441. Venus, sp. ind. a. A small species with concentric laminae,
armed with one posterior row of blunt spines. Interstices with mi-
nute concentric striae.

442. Venus, sp. ind. 6= Chione crenifera, M. 105=F. sugillata,
Rve. C. I. no. 43.

443. Cytherea affinis. Probably = Callista concinna, var., M. 99.

444. Cytherea aurantiaca= Callista aurantia, M. 92.

445. Cytherea consanguine a^= Callista c. Messrs. H. and A.
Adams have not made a subgenus to include this group of thin, in-
flated, almost colourless species.

446. Cytherea radiata=Trigona r., M. 83.

447. Cytherea squalida= Callista chioncea, M. 93.

448. Artemis dunkeri= Dosinia d., M. 90.

449. Artemis saccata=Cyclina subquadrata, M. 91.

450. Gouldia pacifica, M. 116.

451. Cyrena maritima. Stet. The collection also contains two
tubes, containing a very young " ? Cyclas " and another " Cyrena t
jun.," marked " Panama, C. B. Ad."

452. Lucina tellinoides=Felania t. Differs from F. sericata t

201



29 DR. P. P. CARPENTER ON THE SHELLS OF PANAMA.

M. 152, in having a yellow, not silky, epidermis. The specimens
vary considerably in thickness. The genus scarcely differs from
Miltha.

453. Capsa altiorIphigenia a., M. 69.

454. Donax assimilis y M. 74.

455. Donax gracilis. Stet.

456. Donax navicula, M. 77.

457. Donax rostratus. This single valve proves to be the true
D. carinatus, M. 71, and not the shell which I called D. culminatus,
M. 72 ( = carinatus, var., Hani, in Mus. Cum.), which I subse-
quently affiliated to the supposed rostratus, Maz. Cat. p. 548, on the
authority of Dr. Gould's specimen. We were probably both misled
by the " very sharp angle," which (as compared with the other form)
I should call rounded, and the "concave" surface, which I should
translate into flat. The names have been altered in the Cumingian
collection since the Mazatlan shells were identified ; but Mr. Hanley
informs me that they are now correct; that the D. culminatus, M.
72, is his own original carinatus; and that the D. carinatus, M. 71
(olim Mus. Cum.), which is certainly D. rostratus, P. 457, must
stand under Prof. Adams's name.

458. Tellina aurora. Stet.

459. Tellina cognata, C. B. kd.=zPsammobia casta, Rve., teste
Cuming. The sculpture consists of semidiagonal striae passing over
the lines of growth. In other specimens examined from Panama
these are sometimes crowded, sometimes distant, occasionally flex-
uous, sometimes almost evanescent.

460. Tellina columbiensis. (Peroncea.)

461. Tellina concinna=Macoma c. The "slight tinge of pink"
I could not discover.

462. Tellina crystallinaTellidora c.

463. Tellina cumingii, M. 55.

464. Tellina dombeyi=Macoma d., M. 50.

465. Tellina felix, M. 51. (Angulus.)

466. Tellina laceridens. (Peron&oderma.)

467. Tellina pror a. (Peronceoderma.)

468. Tellina puella. Not unlike T. felix, and distinct from M. 59.

469. Tellina rubescens. (Perontcoderma.)

470. Tellina siliqua. The two odd valves belong probably to a
Ma coma, in shape resembling Thracia phaseolina.

471. Tellina simulans=T. (Peronceoderm a) punicea, M. 54. The
species was described, for geographical reasons, from a young, pale,
and undeveloped valve. On comparing it with the Protestor's ov\u
West Indiau specimens, I could detect no difference.

202



i. P. P. CARPENTER ON THE SHELLS OF PANAMA. 29



472. Tellina sincera = Striffilla s.

473. Tellina vicina = Heterodonax vicinus. The shells are la-
belled T. versicolor by the Professor. They are larger than the ge-
neral run of West Indian specimens ; but the form is probably a
local variety of the old Heterodonax bimaculatus.

474. Tellina, sp. ind. a. The doubt concerning "concave" and
" convex" probably arises from an error in description.

4/5. Tellina, sp. hid. b. Looks exactly like the young of No. 4 74,
but with lateral teeth.

476. Tellina, sp. ind. c. Dead valves of T.felix, No. 465.

477. Petricola cognata. More characteristic specimens from the
same coast are affiliated by Mr. Cuming to P. pholadiformis, from
which this would probably not have been separated had it appeared
on the Atlantic coast.

478. Saxicava 1 tennis. The Panama shell is more like Petricola
than Saxicava, having two teeth in each valve, one of which is bifid.
Sowerby's species is called by Messrs. H. & A. Adams " Saxicava
tennis" (ii. p. 349) and " Petricola tennis" (ii. p. 441). Shell with
very fine radiating striae, crossed by irregular striae of growth.

479. Cumingia coarctata=C. lamellosa, var., M. 42.

480. Cumingia trigonularis, M. 43.

481. Cumingia, sp. ind. a=C. trigonularis, No. 480.

482. Cumingitty sp. ind. b= C. var. coarctata, No. 479.

483. Cumingia, sp. ind. c=M. 45. This appears a distinct spe-
cies, and may be quoted as C. adamsii, in remembrance of the labours
of Messrs. EL, A. and C. B. Adams.

484. Cumingia, sp. ind. c?=Maz. Cat. tablet 107, p. 31; well
rounded, with close striae. Probably distinct.

485. Amphidesma bicolor= Semele Ivenusta, M. 41 (non A. Ad.).
The " species" in this genus are often separated by very variable
characters.

486. Ampkidesma 1ellipticum= Semele e.

487. Amphidesma proximum. The type is not quite so elliptical
as the last species ; but as this is a very variable character (v. Maz.
Cat. p. 28), I should regard it as the same. It is not the Semele
proxima, M. 40 ( = S.flavescens, v. Maz. Cat. p. 548).

488. Amphidesma pulchrum= Semele p.

489. Amphidesma striosum = Semele s. I should describe the
shell as smooth, with very fine diagonal striae crossing the lines of
growth. It has the general aspect of S. pulchra. The teeth in one
valve are long and sharp.

490. Amphidesma tortuosum= Semele t. Teeth short and faint.

491. Amphidesma ventricosum= Semele v. The "zones" are very

203



30 DR. P. P. CARPENTER ON THE SHELLS OF PANAMA.

" ill-defined." Teeth scarcely visible. It looks outside like a dead
valve of Macoma solidula.

492. Crassatella gibbosa. Also found at Cape St. Lucas.

493. Mulinia donaciformis = M. angulata, M. 80.

494. Mulinia ventricosa=Mactrella exoleta, M. 78.

495. Lutraria elegans=Harvella elegans ; ascribed by Messrs.
H. & A. Adams to Florida (ii. p. 3/8), from which I have never
seen it. It is a rare, but (under different names) somewhat widely
diffused west-tropical shell. Its "analogue" from Florida and Ca-
rolina is Raeta canaliculata.

496. Mactra velata= Standella v. Vide M. 79. The "small
variety" is conspecific.

497. Anatina alia. This valve of Periploma may prove identical
with one of the four Gulf species. The spoon is supported under-
neath by a linear plate.

498. Pandora cornuta. It is singular that neither Prof. Adams
nor Dr. Gould observed that the peculiar characters of this species
are due to a fracture, producing a beak and sinus which are not seen
on the lines of growth. The sentences about the "rostriform pro-
jection," the " sinus," and the " prominent angle," should therefore
be erased from the diagnosis. The hinge-teeth consist of a long
sharp tooth, very pointed, in one valve, fitting against a less prominent
one in the other ; a slight ligamental tooth in the first valve only ;
and a very long, sharp, clavicular tooth in each valve, running near
the posterior margin, against the inside umbonal portion of which
the ligament is attached. Should it prove identical with P. clavicu-
lata, the earliest name (as being given in error) may advantageously
be dropped. It is surprising that Messrs. H. & A. Adams have not
divided the old Lamarckian genus even into subgenera.

499. Potamomya aqualis. 500. P.inflata. 501. P. trigonalis.
These three forms of Azara differ in outline, but not more than do
some other species of Corbulids and such shells as Trigona radiata.
The teeth, pallial lines, and general characters are the same in each.
The first two I should consider certainly identical ; and a large series
of specimens would probably graduate to the third.

502. Corbula bicarinata, M. 30.

503. Corbula biradiata, M. 31.

504. Corbula obesa. Stet.

505. Corbula ovulata, M. 33.

506. Corbula rubra. A young orange-tinted specimen of C. bi-
radiata, No. 503. The "broad flexure" is an accidental growth,
not shown in the lines of growth of an earlier stage.

507. Corbula tennis. Stet.

508. Corbula^ sp. ind. a. A very small angular valve, with sharp
concentric ridges. It may belong to C. pustulosa, M. 32.

204



DR. P. P. CARPENTER ON THE SHELLS OF PANAMA. 31

509. Corbula, sp. ind. b. Dead valves of C. biradiata, No. 503.
To the same species may be referred C. polychroma. We were mis-
led by the different appearance of the dead shell, and by the locality-
mark in Col. Jewett's collection. His specimens were probably from
Panama or Acapulco.

510. Solecurtus affinis, M. 37. It is probable that this species
is identical with S. (tNovaculina) caribbceus. The Ariquibo speci-
mens of the latter in Mus. Amherst are more like the Mazatlan shells
than those are to the Panama type. Shells from Cape Palmas were
affiliated to the Caribbsean species by Mr. Cuming.

511. Solen rudis=Ensatella r. This interesting form passes
towards Pharella. It is called " Solena cbliqua, Spengl., var." in
Mus. Cuming.

512. Pholas crudgera. With the general aspect oiBarnea Candida.

513. Pholas tubif er a=- P holadidea t. Of the melanura type, with
a solid tube fitting on to the ends of the cups.

514. Pholas xylophaga. Of the Martesia type, without cups.
Dorsal and ventral plates long ; umbonal plates moderate ; wave of
the adolescent gape rather suddenly arched.

515. Pholas , sp. ind. a. Col. Jewett's specimens of the

same shell are named laqueata by Mr. Cuming. It is of the non-
waved, concameroid type; without radiating sculpture; concentric
lamellae beautifully frilled.

516- Pholas, sp. ind. b. So like P. dactylus that it might be
taken for a worn valve from ballast. The sculpture-ridges are, how-
ever, further apart ; hinge-chambers larger and more numerous, with
a little twisted lamina beyond ; gape less conspicuous.

517. Orbicula cumingii Discina c., M, 14.

The shells unfortunately are all loose, in trays, with the autograph
names on tickets. Prof. Adams's West Indian collections are in the
same condition ; and both series are arranged together, in zoological
order, in the midst of the general collection. There is no evidence,
however, that they have been handled since the Professor left them,
none of the leading conchological writers in the New World having
thought it needful to go out of their way to complete a review of the
Professor's work. Amherst is situated on a branch railway, and is
within an easy walk of Northampton, Mount Holyoak, and the deli-
cious scenery of the Connecticut River. In the College buildings
are also deposited the most complete series of the Fossil Footprints
of the Connecticut River, and the mineralogical collection (including
the meteorolites) belonging to Prof. Shepnera.

205



c.



DIAGNOSES



OP



NEW FORMS OF MOLLUSKS COLLECTED AT CAPE
ST, LUCAS BY MR, J. XANTUS.



BY
PHILIP P. CARPENTER, B. A., PH. D.



From the Annals and Magazine of Natural History. Third Series, Vol.
XIII., pp. 311-315, April, 1864. Ibid. (Nos. 15-36) pp. 474-479, June,
1864. Ibid. Vol. XIV. (Nos. 37-52), pp. 45-49, July, 1864.



( 207 )



DIAGNOSES

OP

NEW EOEMS OP MOLLUSKS

COLLECTED AT CAPE ST. LUCAS BY MR. J. XANTU&

BY

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



THE specimens here described belong to the Museum of the
Smithsonian Institution, Washington, D. C. The first available
duplicates will be found in the British Museum or in the
Cumingian Collection. An account of the labours of Mr. Xantus
will appear in the forthcoming volume of British Association
Reports ; and detailed notes on the species may be consulted in
the American scientific periodicals for the current year.

Genus ASTHENOTH^ERUS*.

Testa extus "Thracice" similis : intus cardine edentulo, haud
spathulato ; cartilagine infra umbones sita.

1. Asthenoth&rus villosior.

A. testa insequivalvi, insequilaterali, umbonibus ad trientem lon-
gitudinis sitis ; tenuissima, alba, (sub lente) omnino minutissime
et creberrime pustulosa ; rugis incrementi obtusissimis, irregulari-
bus, maxime t. juniore, ornata ; epidermide tenui, pallide olivacea
induta ; parte postica truncata, parum hiante ; antica valde rotun-
data ; marginibus dorsalibus et ventrali parum excurvatis ; um-
bonibus angustissimis ; regionibus lunulari et nymphali subcari-
natis : intus, margine cardinal! utriusque valvse acuto ; ligamento
inconspicuo ; cartilagine subspongiosa, satis elongata, postice de-
flecta ; fovea haud indentata ; cicatricibus adductorum parvis,
subrotundatis ; sinu pallii majore, ovali, ad dimidium interspatii
porrecto. Long. -38, lat. -26, alt. '14 poll.f

* 'A.cr6i>r)s, weak ; Qaiobs, hinge.

f The measures of length are taken from the anterior to the posterior
margins. The " detailed notes " are still in MSS.

14 209



2 Dr. P. P. Carpenter on new Forms of Mottuski

2. Solemya volvulus.

S. testa minore, tenuissima, diaphana, vix testacea, cornea, pallkliorn,
imeis tenuibus, distantibus, fuscis, radiatim ornata ; postice tenui*
ter radiatim striata ; tumente, satis elongata, marginibus antuo et
postico regulariter excurvatis ; umbonibus vix conspicuis ; line?&
anticis divaricantibus, extus parentibus, intus lacunam cartila-
gineam definientibus ; cardine edentulo ; ligamento postice elou-
gato, antice curto, latiore, bifurcato ; cicatricibus adductorum
subi otundatis. Long. *85, lat. *25, alt. *14 poll.

3. Tellina (Peronaoderma) ochracea.

T. testa majore, parum insequilaterali, tenui, satis planata ; carneo-
ochracea, intus intensiore ; Isevi, nitida, marginem versus striis
increment!; postice vix radiatim striatula; ventraliter antice
valde excurvata, postice vix angulata ; marginibus dorsalibus ob-
tuse angulatis, umbonibus conspicuis ; ligamento tenui et cartila-
gine subinternis ; nymphis intortis : dent. card, utriusque valvae ii.,
quarum i. bifidus ; dent. lat. valvse dextrae ii.; siuu pallii irregula-
riter ovali, per duos trientes interstitii porrecto ; cicatr. adduct.
subovatis, nitidissimis. Long. 1'9, lat. 1*4, alt. '44 poll.

4. Psammobia (tAmphichana) regularis.

P. testa minore, regulariter ovali, subaequilateraii ; violacea, plus
minusve radiata seu maculata ; Isevi, striolis increment! ornata ;
epidermide tenui, flavido-olivacea induta, postice rugulosa ; mar-
ginibus undique regulariter excurvatis ; umbonibus vix projectis ;
ligamento conspicuo : intus dent. card, ii. i., baud bifidis ; cicatr.
adduct. postica rotundata, antica ovali ; sinu pallii elongato, baud
incurvato, per duos trientes interstitii porrecto. Long. 1 '05, lat. 'b v
alt. -26 poll.

5. Callista pollicaris.

C. testa magna, ventricosa, solidiore ; epidermide tenuissima induta ;
sordide albida, umbonibus rufo-fuscis ; (t. adolescente) punctulis
crebris rufo-fuscis, et tseniis paucis circa nymphas oruata ; laevi,
striis increment! exceptis ; postice, et paululum antice, quasi pol-
lice impresso notata ; latiore, antice producta, sed baud angulata ;
postice unda depressa, supra nymphas radiante, inter costas duaa
obsoletas sinuante, margine subtruncato ; marginibus ventrali
rt-gulariter excurvato, dorsali rectiore ; lunula elongata, linea iia-
jressa definita, medio tumente, postice flaccida : intus Candida ;
dent. card, normalibus ; dente laterali valvse dextrae postico, valv t \
sinistrse antico, usque ad extremitatem lunulse porrecto ; cicatr.
adduct. subrotundatis ; sinu pallii magno, rotundato, usque ad
medium interstitii porrecto. Long. 2*58, lat. 2*25, alt. T43 poll.

Figured by Mr. Reeve (Conch, f. 45) as " Dione prom, var."
The above diagnosis proves it to be a distinct and (ooMsulering
the general similarity of the thin, colourless, inflated group) a
speciea.

210



collected at Cape St. Lucas. 3

6. (Jallista (Tpannosa, var.) puella.

C.. testa "C. pannos&'^simili, sed multo minore, tenuiore, plerum-
que latiore ; sinu pallii majore, eleganter incurvato ; dent, card
multo tenuioribus, lat. ant. magis elongate ; lamina cardinal! urn-
bones versus sinuata : colore maxime variante ; nonnunquam ut
in C. pannosa triangulariter maculata ; plerumque ut in Tapete
virginea notata ; interdum albida, seu aurantia, seu fusca, baud
maculata ; rarius ut in Tapete fuscolineata penicillata ; rarissini-2
paucistrigata, seu maculis paucissimis. Long. *66, lat. *5, alt. 'J2
poll.

Variat t. transversa. Variat quoque t. subtrigona, et formis inter*
mediis.

Quoted by Mr. Reeve, under Dione pannosa, as " D. puella,
Cpr."; but the name was only given in MS. in accordance with
Mr. Cam ing's assertion that it was distinct. The colourless sub-
trigonal shells were regarded by Mr. Reeve as a separate species ;
but he did not allude to them in his monograph.

7. Levicardium apicinum.

L. testa snbtrigona, parva, tenuissima, nitidissima, sub com press a,
epidern<>de tenui induta ; radiis seu striis radiantibus nullis ; striis
concentfieis satis regularibus, subobsoletis, t. jun. magis extant-
bus ; umbonibus angustis, parum incurvatis ; margine ventrali
satis excurvato, antico parum producto, postico subtruncato,
dorsalibus obtuse angulatis : colore valde variante ; plerumque
pallide viridi-cinereo, rufo-fusco seu angulatim tseriiato seu macu-
lato seu punctate ; regione umbonali plerumque pallida, interdum
rufo-fusca seu aurantiaca ; parte postica baud intensiore : intus
plerumque citrina, hepatico varie penicillata : dent. card, et lat.



Online LibraryPhilip P. (Philip Pearsall) CarpenterThe mollusks of western North America → online text (page 28 of 45)