Z Dr. P. P. Carpenter on new Forms of Mollusk$ 



2. Solemya volvulus. 



S. testa minore, tenuissima, diaphana, vix testacea, cornea, pallidiofiv 

 lineis tenuibus, distantibiis, fuscis, radiatim ornata ; postice tenui- 

 ter radiatim striata ; tumente, satis elongata, marginibus antii-^o et 

 postico regulariter excurvatis ; umbonibus vix conspicuis ; lineia 

 anticis divaricantibus, extus parentibus, intus lacunara cartila- 

 gineam definientibus ; cardine edentulo ; ligamento postice elon- 

 gate, antice curto, latiore, bifurcate ; cicatricibus adductorum 

 subrotundatis. Long. -85, lat. -25, alt. "14 poll. 



3. Tellina (Peronaoderma) ochracea. 



T. testa majore, parum inaequilaterali, tenui, satis planata ; cameo- 

 . ochracea, intus intensiore; Isevi, nitida, marginem versus striis 

 kncrementi; 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 valvse ii., 

 quarum i. bifidus ; dent. lat. valvse dextrae ii.; sinu pallii irregula- 

 riter ovali, per duos trientes interstitii porrecto ; cicatr. adduct. 

 subovatis, nitidissimis. Long. 1'9, lat. 1'4, alt. "44 poll. 



4. Psammobia {J. Amphicluend) regularis. 



p. testa minore, regulariter ovali, subcequilaterali ; violacea, plug 

 minusve radiata seu maculata ; laevi, striolis increment! ornata ; 

 t-pidermide tenui, flavido-olivacea induta, postice rugulosa ; mar- 

 f;;inibus undique regulariter excurvatis ; umbonibus vix projectis ; 

 ligamento conspicuo : intus dent. card, ii.-i., baud bifidis ; cicatr. 

 adduct. postica rotundata, antica'ovali; sinu pallii elongate, baud 

 incurvato, per duos trientes interstitii porrecto. Long. 1 "Oo, lat. -b, 

 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 taeniis paucis circa nymphas ornata ; Isevi, 

 striis incrementi exceptis ; postice, et paululum antice, quasi pol- 

 lice impresse notata ; latiore, antice producta, sed baud angulata ; 

 postice unda depressa, supra nymphas radiante, inter costas duaa 

 ubsoletas sinuante, margine subtruncato ; marginibus ventraU 

 regulariter excurvato, dorsali rectiore ; lunula elongata, linea ini- 

 jiressa definita, medio tumente, postice flaccida : intus Candida; 

 dent. card, nermalibus ; dente laterali valvse dextrse postico, valvrtj 

 sinistrse antice, usque ad extremitatem lunulse porrecto ; cicatr. 

 adduct. subrotundatis; sinu palhi magno, rotundato, usque ad 

 medium interstitii porrecto. Long. 2-58, lat. 2-25, alt. 1-43 polL 



Figured by Mr. Reeve (Conch, f. 45) as " Diane prora, var." 

 The above diagnosis proves it to be a distinct and (considering 

 the general similarity of the thin, culoiirless, itiliatud i^ruup) a 

 Well-mart cd species. 



210 



