312 Dr. P. P. Carpenter on new Forms of Mollusks 
tuse angulatis, umbonibus conspicuis ; ligamento tenui ef cartila~ 
gine subinternis ; nymphis intortis : dent. card. utriusque valve ii., 
quarum i. bifidus ; dent. lat. valvee dextree ii.; sinu pallu irregula- 
riter ovali, per duos trientes interstitii porrecto; cicatr. adduct. 
subovatis, nitidissimis. Long. 1°9, lat. 14, alt. 44 poll. 
4 Psammobia (? Amphichena) regularis. 
P. testa minore, regulariter ovali, subzequilaterali; violacea, plus 
minusve radiata seu maculata; leevi, striolis incrementi ornata ; 
epidermide tenui, flavido-olivacea induta, postice tugulosa ; mar- 
ginibus undique regulariter excurvatis ; umbonibus vix projectis ; 
ligamento conspicuo : intus dent. card. ii—i., haud bifidis ; cicatr. 
adduct. postica rotundata, antica ovali; sinu pallii elongato, haud 
incurvato, per duos trientes interstitii porrecto. Long. 1-05, lat. °5, 
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 teeniis paucis circa nymphas ornata ; leevi, 
striis incrementi exceptis ; postice, et paululum antice, quasi pol- 
lice impresso notata; latiore, antice producta, sed haud angulata ; 
postice unda depressa, supra nymphas radiante, inter costas duas 
obsoletas sinuante, margine subtruncato; marginibus ventrali 
regulariter excurvato, dorsali rectiore ; lunula elongata, linea im- 
pressa definita, medio tumente, postice flaccida: intus candida; 
dent. card. normalibus; dente laterali valvee dextree postico, valvze 
sinistree antico, usque ad extremitatem lunulz porrecto; cicatr. 
adduct. subrotundatis; sinu pallii 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 “ Dione prora, var.” 
The above diagnosis proves it to be a distinct and (considering 
the general similarity of the thin, colourless, inflated group) a 
well-marked species. 
6. Callista (? pannosa, var.) puella. 
C. testa “C. pannose”’ simili, sed multo minore, tenuiore, plerum- 
que latiore ; sinu pallii majore, eleganter incurvato; dent. card. 
multo tenuioribus, lat. ant. magis elongato; lamina cardinali um- 
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, haud 
maculata ; rarius ut in Tapete fuscolineata penicillata ; rarissime 
paucistrigata, seu maculis paucissimis. Long: °66, lat. °5, alt. °32 
poll. 
pi sae 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 
