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 



