36 



Subgenus Calypeopsis, Less. 

 Cyatho interno integro, lateialiter adliaerente. 



Calypth^ea badiata. Cal. Icstd conico- orbicular i, albida fusco ra- 

 iliatd, striis longiludinaliliis crehris ; limbo crenulato ; apice acuta, 

 subreciirvo ; cynllio depresso : diam. 1 , nit. ^V poll. 



Hah. in America Meridionali. (Bay of Caraccas.) 



The cup of this pretty species is pressed in, as it were, on one side, 

 and adheres to the shell not only by its apex, but also by a lateral 

 seam, which scarcely reaches to the rim of the cup. The apex of the 

 younger specimens, both externally and internally, is e^enerally of a 

 rich brown, and there can be little doubt that when first produced 

 they are entirely of that colour. 



Found in sandy mud, on dead shells, at a depth of from seven to 

 eight fathoms. — W. J. B. 



Calyptujea iMBincATA. Cal. testa albidd, crassd, suhconicd, avatd, 

 coslis longitudinalibuset sqiiamis transversis imbricatd ; apice sub- 

 incurvo, acuto ; limbo cretia to ; cyatho depresso : diam. \,lat.%, 

 alt. I poll. 



Hab. ad Panamam. 



Found on stones, in sandy mud, at a depth of from six to ten fa- 

 thoms.— W. J. B. 



Calyptk.ea lignaria. Cal. testd crassd, fused, cleformi, striis cor- 

 rugatd; apice promiitentesubadunco, acuto, posteriore : long. IxV, 

 lat. 4, alt. -I poll. 



Hab. in America Central!. (Real Llejos.) 



The majority of individuals of this species have their shells so de- 

 formed that they set description at defiance : the comparatively well- 

 formed shell occurs so rarely that it may be almost considered as the 

 exception to the rule. When in this last- mentioned state, the circum- 

 ference of the shell is an irregular, somewhat rounded oval, and it 

 rises into a shape somewhat resembling the back of Ancylus,-w'\\\\ the 

 o/jea? very sharp and inclining downwards. The shell in this shape is 

 generally less corrugated than it is in deformed individuals, though 

 some of those are comparatively smooth ; but in both states the shell 

 is striated immediately under the apex, and is for the most part cor- 

 rugated on the other side of it. 



Found under stones. 



Var. fi. Enormiter conica, cyatho vald^ profundo. 



This variety is often one inch and six eighths in height, and its cup 

 nearly one inch deep, while the diameter of the shell at the aperture 

 does not exceed one inch. 



Found on shells at the Island of Chiloe, in sandy mud, at the depth 

 of four fathoms. — W. J. B. 



Calyptr^ea tenuis. Cal. testd irregulari, tenia, subdiaphand, ere- 

 berrime striata, albidd in terdum fusco pallide strigatd : diam. 1 

 circ.i alt. -^ poll. 

 Hab. ad Peruvise oras. (Samanco Bay.) 



Found on living shells, in muddy sand, at a depth of nine fathoms. 

 — W. J. B. 



