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Philip P. (Philip Pearsall) Carpenter.

The mollusks of western North America online

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acutis, tenuibus ; margine minutissime subobsoletim crenulato.
Long. *55, lat. *5, alt. -3 poll.

Variat t. latiore. Variat quoque colore fere omnino hepatico, seu
carneo, seu pallide aurantiaco, seu pallide cinereo, seu albido :
rarissime ut in Tapete fuscolineata oraata.

8. Lucina lingualis.

L. testa solida, linguiformi, valde prolongata ; plerumque aurantiaco-
carnea, intus intensiore ; lirulis concentricis obtusis crebre ornata ;
marginibus undique excurvatis ; lunula minima, altissime excavata;
parte postica obscure biangulata, seu subrotundata ; umbonibus
anticis incurvatis; ligamento subinterno, lamina valid a ; dent,
card, et lat. normalibus, validis ; cicatr. adduct. posticis subovali-
bus, anticis satis elongatis ; linea pallii lata, rugosa ; margine in-
terno crenulato. Long. -88, lat. '92, alt. '4 poll.

Variat t. minus prolongata. Variat quoque t. pallide viridi, seu pal
lide carnea, seu alba.

9. tCrenella inflata.

1C. testa yalde inflata, minuta, albida, subrhomboideo- orbicular? ;

211



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

diagonaliter parum producta ; marginibus subquadrangulatim ro-
tundatis ; umbonibus prominentibus, valde antice intortis ; tota
superficie ut ia C. decussata sculpta, costulis crebris radiantibus
sequidistantibus, hie et illic aliis intercalatis ; lirulis concen-
tricis decussantibus : intus margine dorsali brevissimo, arcuato,
dentato ; ligamento curtissimo, in fossa omnino interna, celata, la-
mina definiente, sito ; lamina cardinali sub umbonibus intus por-
recta, dentibus validis instructa ; marginibus internis omnino cre-
natis ; cicatr. adduct. subsequalibus, ventraliter sitis. Long. *1,
Int. -12, alt. -09 poll.

Located provisionally in Crenella from its likeness to C. de-
cussata, but with peculiarities of hinge and adductors which
approach Nuculina on one side and Cardilia on another.

Genus BRYOPHILA*.

Animal Aviculidseum, viviparum : inter algas, etc., habitans.
Testa Pinnaeformis, extus prismatica, intus subnacrea : ligamentura
solidum : umbones extantes, terminates, intus concavi.

10. Bryophila setosa.

B. testa parva, regulari ; cinerea, salmoneo sen chocolateo, intus sub-
jiacreo, exquisite tincta : t. juniore planata, semirotundata, dor-
saliter recta, eequilaterali, conspicue punctata : t. adolescente sub-
diaphana : t. adulta solidiore ; umbonibus rectis, terminalibus,
intus alte excavatis ; marg. dorsali breviore, recto ; antico recto ;
ventrali et postico late rotundatis : extus epidermide subspongiosa
v?stita, radiis setarum subdistantibus, marginibus eleganter pecti-
natis : intus ligamento solido dorsaliter producto ; limbo pallii
eequaliter prope marginem decurrente ; cicatr. adduct. subrnediana,
inconspicua ; postice hiante ; antice propter byssum tenuem si-
nuata. Long. -13, lat. '2, alt. '1 poll.

Like a minute Pinna, or a transverse Maryaritiphora without
eary, or an Isognomon without pits. Differs from the other
Aviculids in being viviparous, like some other minute bivalves.

11. tAtys casta.

tA. testa elongata, tenui, subdiaphana, albida; antrorsum paulum
tumidiore ; spira celata, lacunata, (t. adultse) baud urnbilicata ;
columella paulum intorta, effusa ; umbilico antico minirno ; labro
postice producto, obtuse angulato ; tota superficie subtiiiter spira-
liter striatula. Long. *4, lat. -18 poll.

On the confines of the genus, related to Cylichna.

12. Ischnochiton parallelus.

I. testa ovata, subelevata (ad angulum 120); rufo-fusca, olivaceo
tincta ; valvis latis, marginibus parum rotundatis, interstitiis par-

* Epvov, sea-moss; <pi\os, loving.

212



collected at Cape St. Lucas. 5

vis ; ralvis intermediis valde insculptis ; areis lateralibus seriebus
granulorum ajugo radiantibus circitervi.; interdum irregularibus,
granis rotundatis, separatis, extantibus ; areis centralibus clathris
creberrimis, jugo parallels, horridis, extantibus, interdum granu-
losis, ornatis ; valvis terminalibus seriebus granulorum, circ. xx.,
interdum bifurcantibus, ut in areis lateralibus, ornatis ; mucrone
vix conspicuo ; limbo pallii angusto, pilulis furvicaceis creberrimis
minutis conferto ; lobis valvarum bifidis, terminalibus fisc? is
circ. xi. a parte externa simplici disjunctis. Long. '7, lat. '48,
alt. -16 poll.

Belongs to the group with minute setose scales.

13. Ischnochiton (? var.) prasinatus.

I. testa J. parallelo forma et indole simili, sed vivide viridi ; ar.
diag. seriebus bullularum ir; egulariter ornatis ; ar. centr. clathria
valde extantibus, acutis, jugo obtuso paiallelis, utroque latere
circ. xvi. ; valv. term, seriebus bullularum circ. xviii. ; mucrone
submediano, inconspicuo ; umbonibus baud prominentibus ; tota
superficie minutissime granulosa : intus valvarum lobis mediarum
i.- term, circiter x.-fissis ; sinu lato, planato ; suturis plauatis ;
limbo pallii angusto, minutissime squamulis furvicaceis creberrime
instructo ; interdum pilulis intercalatis. Long. '8, lat. *4 poll.,
div. 125.

14. Ischnochiton serratus.

I. testa parva, cinerea, olivaceo hie et illic, prsecipue ad suturas,
punctata, interdum sanguineo maculata ; ovali, subdepressa, suturis
indistinctis ; tota superficie minutissime granulata ; ar. diag. valde
distinctis, costis latissimis obtusis ii.-v. munitis, interstitiis nullis;
marginibus posticis eleganter serratis ; ar. centr. costis acutis,
parallelis, utroque latere circ. xii. ; jugo obtuso, hand umboriato :
costis transversis, subradiantibus, fenestrantibus, interstitiis im-
pressis : mucrone mediano, obtuso; valv. term, costis obtusis, ut
in ar. diag., circ. xx. : intus valvarum mediarum lobis bifissis,
terminalium circ. ix.-fissis ; lobis suturalibus magnis : 1'mbo pallii
squamis majoribus, imbricatis, vix striatulis. Long. '34, lat. *2 poll.,
div. 115.

Differs from Elcnensis in the sculpture of the terminal valves.

15. Nacella peltoides.

W. testa parva, leevi, cornea, subdiaphana, ancyliformi, apice elevato,
valde inaequilaterali, strigis pallide castaneis radiata ; intus niti-
dissima, subaurantia. Long. '14, lat. '11, alt. '05 poll.

= Nacella. sp. ind., Maz. Cat. no. 262, p. 202.

16. Acm&a (? var.) atrata.

A. testa solida, rugosa, conica, apice paulum antrorsnm sito ; extnfl
costis crebris rotundatis irregularibus, hie et illic majoribus
sculpta, baud apicem versus discordanter corrugatis ; interstitiis

213



G Dr. P. P. Carpenter on new Forms of Mollush

minimis ; intus alba, castaneo et nigro varie maculata ; margine
latiore, nigro tessellato. Long. 1*3, lat. TO, alt. *5 poll.
Variat margine nigro-punctato, punctis plerumque bifidis. Variat
quoque costis parvis, creberrimis ; margine nigro.

Intermediate between " P. discors," Phil., and " P floccata"
Ileeve.

17. Acm&a strigatella.

A- testa A. mesoleucce simili, sed minore, baud viridi ; striolis miiii-
mis, confertissimis, plerumque erosis tenuissime sculpta ; albitui,
strigis olivaceo-fuscis, plerumque radiantibus, interdum confluen-
tibus picta ; apice ssepius nigro ; intus albida, margine satis lato,
strigis tessellato. Long. '9, lat. '74, alt. '3 poll.

Variat colore hie et illic aurantiaco tincto : strigis omnino tessellatis.

According to Darwin, this might be regarded as a cross be-
tween the northern forms A.pelta and A. patina, about to change
into the Gulf species, A. mesoleuca. The dark variety resembles
A. cantharus, but the very delicate crowded strias well distin-
guish it when not abraded.

18. Ghjphis saturnalis.

G. testa G. inaquali simili, sed minore, latiore, altiore, tenuissime
cancellata; striis radiantibus plus minusve propinquis, plus mi-
nusve nodulosis ; fissura prope trientem longitudinis sita, minima,
lirieari, medio lobata ; intus callositate albida, truncata. Long. '38,
lat. -24, alt. -18 poll.
The minute hole resembles the telescopic appearance of Satum

when the rings are reduced to a line.

Subgenus EUCOSMIA*.

Testa solida, nitida, variegata, baud nacrea : apertura et anfractus
rotundati : conspieue umbilicata : peritrema vix continuum, hand
callosum.

The shells here grouped are like small, round-mouthed, per-
forated Phasianella. The animal and operculum of the Cape
St. Lucas species are unknown. The Phasianella striulata, Maz.
Cat. no. 283 b ( = Turbo phasianella, C. B. Ad. Pan. Sh. no. 282),
and even the Lunatia tenuilirata, Maz. Cat. no. 572, are perhaps
congeneric.

19. TZucosmia variegata.

E. testa parva, Isevi, turbinoidea, nitente, marginibus spirse vakle
excurvatis ; rosaceo et rufo-fusco varie maculata ; anfr. nucleosis
regularibus, vertice mamillato ; normalibus iv., valde tumentibus,
rapide augentibus, sutnris impressis ; anfr. ultimo antice producto;
oasi rotuudata ; umbilico carinato ; apertura vix a pariete iuden-

* Th. cv, well ; Kocrp.ia } adorned.

214



collected at Cape St. Lucas. 7

tata; peritremate pene continue, acuto. Long. *1, long. spir. '05,
lat. -07 poll., div. 70.
Variat interdum rugulis increment! ornata.

20. Eucosmia (tvariegata, var.) substriata.

E. testa E. variegatae simillima, sed anfr. circa basin et supra spiram
(nisi in anfr. nucl. Isevibus), interdum tota superficie tenuiter et
crebre striatis ; striis anfr. penult, circ. x.

21. Eucosmia punctata.

E. testa E. vamegata simili, sed multo majore, multo magis elon-
gata, angustiore, Phasianelloidea ; plerumque fusco creberrime
punctata ; umbilico parvo. Long. *22, long. spir. 1 1, lat. 1 5 poll.,
div. 50.

22. Eucosmia cyclostoma.

E. testa parva, valde obtusa, lata, regulari, valvatoidea ; marginibus
spirae vix excurvatis ; pallide cinerea, fusco-olivaceo dense punc-
tata seu maculata ; anfr. nucleosis pallidis, mamillatis ; normali-
bus iii., valde tumentibus, suturis valde impressis ; apertura vix a
pariete indentata ; umbilico magno, subspirali. Long. '05, long,
spir. -025, lat. '05 poll., div. 90.

Curiously like a small depressed Valvata obtusa, but with the
texture of Phasianella.

Genus HAPLOCOCHLIAS*.

Testa Colloniam simulans, sed baud margaritacea : apertura circu-
laris, varicosa : columella baud callosa.

The animal and operculum are unknown. Its affinities may
be with Ethalia.

23. Haplocochlias cyclophoreus.

H. testa compacta, parva, solidiore ; albida, seu pallide aurantiaca ;
anfr. v., rapide augentibus, suturis impressis ; tota superficie mi-
nutissime spiraliter striolata, nitida ; apertura rotundata ; peri-
tremate continue, incrassato, extus varicoso ; labio distincto ; axi
t. jun. umbilicata, adultse lacunata. Long. '19, long. spir. '06,
lat. -2 poll., div. 100.

When laid on its base, this shell resembles Helicina ; but the
mouth is more like Cyclophorus. The young shell is semi-
transparent, and resembles a Vitrinella with thickened lip.

24. Narica aperta.

N. testa parva, inflata, tenui, alba ; anfr. nucl. ? ; norm, rapide

augentibus, lirulis crebris spiralibus, in spira hie et illic majori-
bus, a striolis creberrimis radiantibus minutissime decussatis ;
Suturis valde impressis ; apertura subcirculari ; umbilico maximo,

* TA. dTrXovs, unadorned j Ko^X/a?, snail.
215



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

carinato, anfractus intus monstrante. Long. '28, long. spir. '08,
lat. -Spoil., div. 110.

25 . Fossarus parcipictus.

F. testa parva, solidiore, spira plus minusve elevata; albida, rufo-
fusco varie maculata ; carinulis spiralibus acutioribus, quarum
circ. vi. majpres, striolisque crebris cincta ; anfr. ultimo tumidiore ;
labro acuto, baud intus incrassato ; umbilico satis magno, ad mar-
ginem carinato : operculo normali. Long. '24, long. spir. '06,
iat. -2 poll., div. 90.

The few specimens found are very variable in outline.

26. Fossarus purus.

F. testa F. angulato simili, sed alba, subdiapbana; anfr. nucl. ii.,
fuscis, ut in F. tuberoso cancellatis ; norm. ii. et dimidio, altis,
valde tumentibus, carinatis ; carinis iv., validissimis, acutissimis,
quarum ii. in spira monstrantur ; carinulis aliis antice et postice
plus minusve expressis ; tota superficie minute spiraliter striata ;
carinularum basalium interstitiis subobsolete decussatis ; apertura
late semilunata ; labro a carinis valde indentato ; labio recto, an-
gusto ; umbilico magno, carinato ; operculo fusco, valde pauci-
spirali, minutissime ruguloso, nucleo antico. Long. *08, long,
spir. -03, lat. '08 poll., div. 90.

27. Litorina pullata.

L. testa parva, solidiore, luctuosa ; spira satis exserta ; nigrescente,
seu livido-fusco tincta, lineis spiralibus exilissimis pallidioribus or-
nata ; interdum obscure tessellata ; anfr. v., 'subplanatis, suturis
parum impressis ; sublaevi, striolis spiralibus termiter insculpta ; co-
lumella intus incrassata ; pariete baud excavato. Long. '4, long,
spir. -18, lat. '29 poll., div. 60.

= Litorina, sp. ind., Maz. Cat. no. 399, p. 350.

28. Litorina (Philippn, var.) penicillata.

L. Ph. testa parva, lineis radiantibus, variantibus, delicatulis, rarius
ziczacformibus, et cingulis duobus spiralibus, quorum unum in
spira monstratur, elegantissime penicillata. Long. '33, long,
spir. -14, lat. '2 poll., div. 50.

Closely resembling the West-Indian L. ziczac, var. lineata,
D'Orb. Intermediate specimens, however, clearly connect it
with the common Mazatlan form.

29. Rissoa albolirata.

R. testa parva, alba, crystallina, normali; marginibus spirae undatis;
anfr. nucl. iii., Isevibus, mamillatis ; norm, iv., medio subconvexis,
postice supra suturas planatis ; basi subplanata, effusa, baud um-
bilicata ; lirulis spiralibus crebris, obtusis, quarum circ. x. in spira
monstrantur ; apertura subovata, peritremate continue ; labro

216



Dr. P. P. Carpenter on new Forms of Mollusks. 9

nrcuato, vix antice et postice sinuato, calloso ; labio valido.
Long. !, long. spir. *08, lat. *04 poll., div. 25.

30. Fenella crystalline*.

F. testa alba, subcliaphana, turrita, rudiore ; marginibus spirse rectis,
parurn divergentibus ; anfr. nucl. ?.. . (decollatis) ; norm, v., valde
rotundatis, suturis impressis ; costis radiantibus circ. xvi.. valde
rotundatis, haud extantibus, interstitiis latis ; striis spiralibus
regularibus, in anfr. penult, xvi. ; apertura rotundata ; basi ro-
tundata ; peritremate continue ; labro extus varicoso ; labio cal-
loso. Long. '14, long. spir. !!, lat. -05 poll., div. 20.

31. ? Hydrobia compacta.

tH. testa Isevi, curta, compacta, latiore ; marginibus spirse vix ex-
curvatis ; anfr. nucl. normalibus, apice mamillato ; norm, iv., tu-
midis, suturis distinctis ; spira curtiore ; basi rotundata ; apertura
subovata ; peritremate continuo ; labio definito. Long. *04, long,
spir. -02, lat. '03 poll., div. 70.

This unique shell may be a Barleeia.

32. Hyala rotundata,

II. testa (quoad genus) magna, tenui, alba, diaphana ; anfr. nucl.
normalibus, apice mamillato ; norm, iv., globosis, rapide augenti-
bus, suturis valde impressis ; basi rotundata ; apertura subrotun-
data, ad suturam subangulata ; peritremate continuo ; labio a
pariete separate, rimulam umbilicalem formante ; columella valde
arcuata. Long. '18, long. spir. '09, lat. '1 poll., div. 40.

A unique shell, resembling a marine Bithinia.

33. Wiala electrina.

?D. testa subdiaphana, rufo-cornea, nitida; marginibus spirse parum
excurvatis ; vertice nucleoso, helicoideo ; anfr. iii., tumidis, suturis
haud impressis, apice magno mamillato; anfr. norm, iii., subplanatis,
suturis distinctis ; sculptura haud expressa ; tota superficie cos-
tulis obscuris, latis, spiralibus, quarum vi.-viii. in spira monstran-
tur, et iii.-v. circa basim rotundatam, interdum obsoletis, cincta ;
costulis radiantibus circ. xviii., subobsoletis ; apertura regulariter
ovata, ad suturam angulata, peritremate continuo ; basi haud um-
'bilicata ; columella regulariter arcuata. Long. *09, long. spir. *07,
lat. -03 poll., div. 30.

34. Acirsa Menesthoides.

A. testa nitida, turrita, majore, solidiore, pallide fusca ; anfr. nucl,
laevibus ; norm, vi., subplanatis, suturis distinctis ; lineis crebris
spiralibus insculpta, quarum circ. viii. in spira monstrantur ; testa
adolescente lirulis radiantibus obsoletis decussata ; apertura sub-
ovali; columella solida, irnperforata. Long. '42, long. spir. -tf,
lat. -16 poll., div. 25.

217



10 Dr. P. P. Carpenter on new Forms of Mollusks

35. Cythnia asteriaphila.

C. testa C. tumenfi simillima, sed umbilico minore, baud carinato ,
tenuissima, diaphana ; anfr. iv., tumidis ; vert. nucl. normali, baud
stylineo, apice mamillato : operculo tenuissimo, elementis concen-
tricis, nucleo subrnediano sinistrorsum sito. Long. *03, long.
spir. -015, lat. -025 poll., div. 60.

A solitary specimen was found by Dr. Stimpson, imbedded in
a star-fish, like Sty Una ; from which genus the vertex and oper-
culum distinguish it.

36. Bittium nitens.

B. testa regulari, rufo-fusca, hie et illic pallida, maxime nitente ;
anfr. nucl. iii., laevibus, tumidis, apice submamillato, subdeclivi ;
norm, vi., tumidis, suturis impressis ; costis radiantibus circ. xiv.,
haud contiguis, angustis, interstitiis undatis ; costulis rotundatis,
spiralibus, in spira iv., quarum postica multo minor, supercur-
rentibus, ad intersectiones subnodosis ; costulis circa basim sub-
rotundatam iv., haud decussatis ; apertura subquadrata ; columella
haud truncata, obtuse angulata ; labro acuto, a costulis indentato ;
labio inconspicuo. Long. -21, long. spir. -16, lat. -Od poll., div. 20.

37. Manyelia subdiaphana.

M. testa parva, subdiaphana, albida, interdum rufo-fusco pallide
tincta ; satis turrita, marginibus spirse parum excurvatis ; anfr.
nucleosis iii., leevibus, diaphanis, apice marnillato ; norm, iv., satis
excurvatis, haud angulatis, suturis impressis ; fascia super spiram
pallide fusca, alteraque Candida contigua ; costulis radiantibus
xiv.-xviii., acutis, subrectis, distantibus, interstitiis undatis ; tota
superficie minute et creberrime spiraliter striata ; basi producta,
striis magis expressis ; apertura subelongata ; labro ad dorsum
incrassato, postice distincte emarginato, intus haud dentato ; labio
tenuissimo; columella recta, antice late canaliculata. Long. '19,
long. spir. !, lat. '06 poll., div. 30.

38. Drillia appressa.

D. testa parva, compacta ; rufo-fusca, interdum supra costas palli-
diore; marginibus spirse excurvatis; anfr. norm, vi., planatis,
suturis indistinctis ; costis tuberculosis radiantibus circ. xiv., antice
et postice obsoletis; striolis spiralibus creberrimis ; costa spirali
irregulari postica, tuberculosa, super suturas appressa ; area sinus
parvi vix definita ; basi satis prolongata ; apertura subquadrata ;
labio distincto. Long. '3, long. spir. '17, lat. *12 poll., div. 40.

39. Cithara fusconotata.

C. testa parva, satis turrita, tenui, albida ; postice linea, seu serie
macularum, rufo-fusca, interdum altera peripheriali ornata ; mar-
ginibus spirse rectioribus; anfr. nucl. ii., rotundatis, apice mamil-
lato; norm, vi., in spira rotundatis, suturis impressis; basi satis
rotundata; costis radiantibus circ. ix., acutis, distantibus, antice

218



collected at Cope St. Lucas. 11

et postice subobsoletis ; tota superficie spiraliter sulcata, sulculis
subdistantibus, undatis, costas superantibus ; apertura subovali,
satis elongata, postice valde sinuata ; labro acuto, dorsaliter costu-
lato, intus baud dentato ; labio tenui. Long. '36, long. spir. -18,
lat. -16 poll., div. 40.

40. Obeliscus variegatus.

O. testa 0. hastato simili ; nitidissima, striolis increment! exilissiirus ;
livido et castaneo varie nebulosa ; prope suturam canaliculatam
lineis albidis picta ; hie et illic callositate alba interna ; peripberin
circa basin insculpta, unicolore ; columella truncata, triplicata ;
plica superiore acuta, exstante, circa basim continua ; plicis anticis
parvis, spiralibus. Long. '44, long. spir. *3, lat. -15 poll., div. 23.

41. Odostomia (Evaled) aquisculpta.

0. testa parva, ovoidea, alba, subdiapbanaj marginibus spirse sub-
rectis ; vert. nucl. ?. . . . , normaliter truncate ; anfr. norm, iv.,
parum arcuatis, snturis impressis ; tota superficie costulis spirali-
bus circ. xiv., quarum vi. in spira monstrantur, latis, planatis,
sequidistantibus ; interstitiis parvis; basi rotundata ; apertura
ovata; peritremate baud continue ; labro acuto ; labio subobsoleto ;
plica juxta parietem conspicua, acuta, transversa ; columella arcuata,
rimulam umbilicalem formante. Long. '07, long. spir. '04, lat,
03 poll., div. 40.

42. Odostomia (Evaled) delicatula.

O. testa tenuissima, alba, diaphana, nitente, elongata; margira-
bus spirse eleganter excurvatis ; vert. nucl. leevi, globoso, decli-
viter immerso ; anfr. norm, iii., subplanatis, suturis impressis ;
liris subacutis, spiralibus, quarum v. in spira monstrantur ; inter-
stitiis latis, undatis, creberrime decussatis ; basi elongata ; aper-
tura oblonga, peritremate baud continuo ; labro tenui ; labio vix
conspicuo ; plica juxta parietem exstante, declivi. Long. '075,
long. spir. '04, lat. '03 poll., div. 30.

43. Chrysallida angusta.

C. testa parva, satis elongata, nitida, alba, sculptura minus expressa;
marginibus spirse parum excurvatis ; vert. nucl. parvo, subito
immerso, dimidium truncations tegente ; anfr. norm, v., planatis,
elongatis, suturis minus impressis ; costis radiantibus circ. xiii.,
plerumque lineis continuis marginibus utrinque parallelis, circa
basim productam obsoletis ; lirulis spiralibus angustis, in spira
circ. v., interstitiis decussantibus, supra costas baud nodulosis ;
apertura ovali ; peritremate parum continuo ; labro tenui, trarxs-
lucido ; labio tenui ; plica juxta parietem parva, obtusa. Long.
095, long. spir. '065, lat. '028 poll., div. 20.

44. Eulima fascostrigata.

E. testa minore, gracillima, albida, striga latiore rufo-fusca supra

219



12 Dr. P. P. Carpenter on new Forms of Mollusks

peripheriam ornata ; basi quoque rufo-fusca, valde prolongata,
regulariter excurvata; anfr. nucl. ii., tumidioribus ; norm, viii.,
planatis, suturis baud conspicuis ; varicibus nullis ; apertura valde
elongata ; labro vix sinuate ; labio vix calloso. Long. '17, long.
spir. -12, lat. -05 poll., div. 20.

45. Opalia crenatoides.
0. testa turrita, alba, marginibus spirae rectis; anfr. nucl.?,



% norm, vi., compactis, attingentibus ; costis radiantibus circ. x., in
spira plerumque obsoletis, ultimo anfractu validioribus, latis, baud
exstantibus, attingentibus, spiram lineis fere rectis ascendentibus ;
suturis inter costas altissime indentatis ; carina obtusa basali, su-
turee continua ; inter costas radiantes undique, ut in suturis, iu-
dentata ; costis interdum, propter lirulas spirales subobsoletas, sub-
nodosis ; columella baud umbilicata ; basi antice leevi. Long. '54,
long. spir. -38, lat. '23 poll., div. 30.

Additional specimens may connect tbis with tbe Portuguese
0. crenata.

46. Truncaria eurytoides.

T. testa parva, turrita, gracili ; albida, ssepius fascia circa peripberiam
maculis fusco-aurantiacis picta ; anfr. nucl. mamillatis, laevibus ;
norm, v., effusis, subplanatis, ultimo paulum constricto ; costulis
radiantibus circ. xx., aperturam versus evanidis ; apertura sub-
quadrata ; labro baud incrassato, interdum intus subtiliter striato,
baud dentato ; labio appresso ; columella abrupte truncata.
Long. -3, long. spir. '2, lat. -11 poll., div. 23.

Variat basi fusco tincta, seu tota superficie ut in Nitidella cribraria
picta.

47. Sistrum (? ochrostoma, var.) rufonotatum.

8. testa S. ochrostomati simili, sed minore, angustiore, vix tabulata ;
alba, linea punctorum rufo-fuscorum subperipberiali, interdum
lineis spiralibus, interdum ejusdem coloris maculis, ornata ; vert,
nucl. mamillato, anfr. iii., Isevibus, vix tumidis ; norm, v., plus
minusve elongatis, in medio nodoso-angulatis, postice planatis,
suturis ad angulum valde obtusum conspicuis ; seriebus nodulorum
spiralibus iii., quarum postica major, secundum costas radiantes
obsoletas circ. vi.-viii. ordinatis ; seriebus anticis inconspicuis ii. ;
interdum costulis spiralibus intercalatis ; canali brevi, rectiore,
aperto, angusto ; apertura subovali, vix subquadrata, intus pallide
aurantiaca ; labro acutiore, dorsaliter subvaricoso, postice ssepe
sinuato, intus obscure vi. -dentato ; labio conspicuo, interdum ex-
stante. Long. '5, long. spir. "23, lat. '32 poll., div. 60.

Variat testa obesa, nodulis validis. Variat quoque testa acuminata,
nodulis subobsoletis. Long. '52, long. spir. '23, lat. '25 poll.,
div. 42.

48. INitidella millepunctata.

IN. testa parva, nitida, livida ; spira exstante, anfractibus subpla-
natis, suturis distinctis ; anfr. nucl. Isevibus, adolescentibus obso-

220



collected at Cape St. Lucas. 13

lete radiatim lirulatis, adultis Isevibus ; zona alba postica, suturam



Online LibraryPhilip P. (Philip Pearsall) CarpenterThe mollusks of western North America → online text (page 29 of 45)