^^'i 



56 



costis radiantibus latis, valde elevatis, complanatis, geniculato-no- 

 dosis ; intus albd; epidermide fuscd : long. 2xV. iat. 2, V. alt. 2-^^ 

 poli. 

 Hab. in Sinu Fonseca, Americae Centralis, 



This fine species, far exceeding in size and beauty any Cardita 

 hitherto discovered, was dredged from sandy mud in eleven fathoms 

 water, about seven miles from the shore. After its capture the dredge 

 was kept at work for some hours, but no other specimen could be pro- 

 cured. The ribs are broad, flattened on their superior surface, but 

 very elevated and strongly geniculated, the geniculations being, for 

 the most part, three-tenths of an inch from each other. The shell is 

 a verystriking object, and has almost the appearance of a carved work. 

 — W. J. B. 



^ Caedita TUMiDA. Cūrd. testd subtrigond, tumidd, costis radianti- 

 bus latis, subdepressis ; carned velfulvd, macuUs purpureo-spadi- 

 ceis et flavis varid ; umbonibus recurvis, subacuminatis ; lunuldde- 

 pressd ; epidermide fuscd : long. 2, lat. 1-i, alt. '2-^ poli. 

 Bab. ad Americae Centralis et Meridionalis oras. 

 Found in a young statė at Puerto Portrero, at a depth of eleven 

 fathoms, in fine sand and gravel ; and in a full-grown statė at the Isle 

 of Plata, in coral sand, at the depth of seventeen fathoms. — W. J. B. 



Cardita vaeia. Card. testd subtrigond, costis radiantibus depres- 

 sis ; violaceo-spadiced, maculis albis varid: long. \-į, lat.Ą^, alt. 



l-rr poli. 



Hab. ad insulas Gallapagos. 



Dredged in fine sand at the dppth of six fathoms. — W. J. B. 

 This resembles f^enericardia Jlammea, (tab. 6 in Guerin's ' Magazin 

 de Conchyliologie'j) but is undoubtedly distinct. 



Genus Crassatella. 



Crassatella undulata. Crass. testd ovali, brunned, fusco-macu- 

 latd, epidermide fuscd indutd; intiis brunned, prope marginėm an- 

 ticam albicante ; umbonibus undulatis ; latere antico incUnato ro- 

 tundato, postico longiore, acuminato, angulifero: lo?ig. 2tVj iii- 1» 

 alt. 1^%-poll. 

 Hab. ad Puerto Portrero, Americae Centralis. 

 Dredged from sandy mud in eleven fathoms water. The young 

 shell is of a lighter colour than that which is fully grown ; the undu- 

 lations, moreover, extend over its entire surface. — G. B. S. 



/i^S"'- Crassatella gibbosa. Crass. testd subovali, gibbosd, pallescente, 

 epidermide fuscd indutd ; intus albicante, latere postico brunneo ; 

 umbonibus undulatis, compressis ,- latere antico incUnato, rotundato, 

 suleis nonnuUis brevibus ; postico arcuato, elongato, acuminato : 

 long. l.V, lat. \, alt. l-,^^ poli. 

 Hab. ad oras Americae Meridionalis. (St. Elena and Xipixapi.) 

 Dredged from sandy mud in eleven fathoms vvater. This is the 

 most ventricosespeciesknovvn to Mr. Sowerby; its young is neverthe- 

 less e.\ceedingly compressed, and is, moreover, covered wilh undula- 

 tions, — G. B. S. 



