56 



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

 dosis ; intils albd; epidermide fused : long. 2 T V, lat. 2,V, alt. 2-iV 

 poll. 

 Hub. in Sinu Fonseca, America? 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 very striking object, and has almost the appearance of a carved work. 

 — W. J. B. 



Cardita tumida. Card, testd subtrigond, tumidd, costis radianti- 

 bus latis, subdepressis ; earned vel fulvd, maculis purpureo-spadi- 

 ceis et flavis varid ; umbonibus reeurvis, subacuminatis ; lunuld de- 

 pressd; epidermide fused ; long. 2, lat. l£, alt. 2^ poll. 

 Hub. ad Americse Centralis et Meridionalis oras. 

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

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

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



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

 sis ; violaceo-spadiced, maculis albis varid: long. 1-fr, lat. -j-j-, alt. 

 l^rpoll. 



Hah. ad insulas Gallapagos. 



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



This resembles Fenericardiajlammea, (tab. 6 in Guerin's * Magazin 

 de Conchyliologie',) but is undoubtedly distinct. 



Genus Crassatella. 



&% ^/3 Crassatella undulata. Crass, testd ovali, brunned, fusco-macu- 

 latd, epidermide fused indutd ; intiis brunned, prope marginem an- 

 ticam albicante ; umbonibus undulatis -, latere antico inclinato ro- 

 tundato, postico longiore, acuminate, angulifero : long. 2 T V» lat. 1, 

 alt. 1-rV poll. 

 Hab. ad Puerto Portrero, America? 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. 



Crassatella gibbosa. Crass, testd subovali, gibbosd, pallescente, 

 epidermide fused indutd ; intiis albicante, latere postico brunneo ; 

 umbonibus undulatis, compressis ,• latere antico inclinato, rotundato, 

 sulcis nonnullis brevibus ; postico arcuato, elongate, acuminato : 

 long. 1-rV, lat. 1, alt. 1 T V poll. 

 Hab. ad oras America? Meridionalis. (St. Elena and Xipixapi.) 

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

 most ventricose species known to Mr. Sowerby; its young is neverthe- 

 less exceedingly compressed, and is, moreover, covered with undula- 

 tions, — G. B. S. 



