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Calyptr^ea hispida. Cal. testd subovald, mbconkd, albd strigis 

 maculisgue subpnrpureo-fuscis variu, slriis frequentibus et spinis 

 tubularibus erecth hispida ; limbo crenulato ; apice turbinato ; cya- 

 tho subdepresso : diam. ]ą, lat. ^*2■, alt. ,^,^ poli. 

 Hab. ad Insulam Muerte. (Bay of Guayaąuil.) 

 This degant species, the circumference of vvhose somevvhat de- 

 pressed ciip is free, with the exception of one part wheie it adheres 

 iaterally, was found on dead shells, in sandv mud, at a depth of tvvelve 

 fathoms.— W. J. B. 



Calyptrea maculata. Cal. testd ovatd, albidd purpureo-fusco ma- 

 culatd, longiiudinaliter rugosd ; limbo serrato ; apice subturbi- 

 nato, suhincurvo : diam. Ąį^, lat. -rv. olt. -į poli. 



Hab. ad Insulam Muerte. 



The external contour of this shell, more especially i n the position 

 of the subturbinated apex, much resembles that of Ancylus. The cir- 

 cumference of the cup is free, excepting at one point, where it adheres 

 Iaterally throughout its length. 



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

 — W. J. B. 



Calyptrea serrata. Cal. testd suborbiculari, albd subpurpureo 

 vel fusco interdum fitcatd vel strigatd, costis longitudinalibus 

 prominentibus rugosis ; limbo serrato į apice subturbinato ; cyatho 

 valde depresso : diam. į-, lat. nV> (^l't. tV poll. 



Hab. ad Real Liejos et Muerte. 



Var. testą alba. 



Found on dead shells, in a muddy bottom^ at the depth of from sis 

 to eleven fathoms. — W. J. B. 



Subgenus Syphopatella, Less.? 

 Lamina interna subtrigona, subcirculari, latere dextro replicato. 



CalyptrjEA sordida. Cal. testd subconicd, sordide luted, longiiudi- 

 naliter subradiatd ; apice turbinato; cyatho depresso, subtrigono, 

 haud profundo : diam. į-, lat. -^, alt. -^ poll. 

 Hab. ad Panamam. 



This species, the inside and outside of which are ofa sordidyellow, 

 is generally covered externally with coral or other marine adhe.sions. 

 The plate is spoon-shaped. 



Found on stonas, on a sandy bottom, at depth of tvvelve fathoms.—^ 

 W. J. B. 



Calyptk^a Unguis. Cal. testd tenui, conicd, corrugatd, fuscd ; 

 apice subturbinato ; cyatho depresso, subtrigono : diam. -iV> cilt. -ro 

 poll. 

 Hab. ad Valparaiso. 



The plate is spoon-shaped, but not so shallow as that of Cal. 

 įcrdida. 



Found on shells^ at a depth of from seven to fortv-five fathoms. — 

 W. J. B. 



CALYPTRiEA LiCHEN. Cal. tcstd albidd, interdum pallide fusco 



