38 



sparsd, subdiaphanč , suhturhinatu , orbiculatd, complanatd : diarn, 

 •S-, nlt. į poli. 

 Hah. ad Insulam Muerte. 



Found on dead shells, in sandy mud, at a depth of eleven fathoms. 

 — AV. J. B. 



Calyptr^a MAMiLLAnis. Col. testd albidd, subconicd; apice sub- 

 purpureo, mamillare : diam. -jV, cilt. -[%■ poli. 



Hab. ad Insulam Muerte. 



This pretty species vaiies. It is sometimes milk \vhite, with the 

 mamillary apex of a brovvnish purple, and with the inside sometimes 

 of that coiour, sometimes \vliite, and sometimes yellowish. In other 

 individuals the white is mottled \vith purplish brovvn stripes andspots. 



Found on dead shells, in sandy mud, at a depth of eleven fathoms. 

 — W. J. B. 



Calyptr^a striata. Cal. testd sordidi albd, suborbiculafd , suhcO' 

 nicd, subturbinatd, striis longitudinalibus elevatis creberrimis cot- 

 rugatd ; intusfusco-Jlavescente: diam. -\^, alt. -^^y poli. 



Hab. ad Valparaiso. 



Found on shells in sandy mud, at a depth of from forty-five to sixty 

 fathoms. 



CALYPTRiEA CONICA. Cul. tcstd conicd,fuscd albido maculatd, sub- 

 turbinatd : diam. \į, alt. -^ poli. 

 Hab. ad Xipixapi et ad Salango. 

 Found attached to shells in deep water. 



Subgenus Cbkpipatella, Less. 

 Lamina rotundatži, apice laterali et subterminali. 

 Calyptr^ea foliacka. Cal. testd suborbiculari, albidd , f oliaced ; 



intils castaned vel albd castaneo varid : diam. 1 , alt. i poli. 

 Hab. ad Aricam Peruviae, saxis adhaerens. 



This Crepipatella, which bears no remote resemblance to the upper 

 valve of some of the Chamce when vievved from above, was found on 

 exposed rocks near the shore. — W. J. B. 



Calyptr J!:a dorsata. Cal. testd subalbidd, planiusculd, costis longl. 

 tudinalibus irregularibus rugosd ; intus medio fiisco-violaced : 

 diaui. i, lat.-į- poli. 

 Hab. ad Sanctam Elenam. 



The back of this shell is not unlike the upper valve of some of the 

 Terebratulce. 



Found on dead shells, in sandy mud, at a depth of six fathoms. — 

 W. J. B. 



Calyptb^a dilatata, Lam., varietas intus nigro-castanea. Cal. 

 testd sordide albd castaneo strigatd ; intils nitide nigro- castaned ; 

 lamind albd : diam. 1-f, lai. \-^, alt. ^ poli. 

 Hah. ad Valparaiso. 



This highly coloured variety was found on exposed rocks at low 

 water. The pure vvhite of the plate shows to great advantage, lying 

 aV)ove the ricli back ground of the interior of the shell. In some in- 

 dividuals this internal colour is all but black. — W. J. B. 



