1902.] NATURAL SCIENCES OF PHILADELPHIA. 703 



Cardita gibbosa Reeve, 1843, is synonymous. Courad, in 1832, 

 figured an East Indian species on the strength of a valve said to 

 come from Tampa Bay, which he identified with Sowerby's C. in- 

 crassata, and which was renamed G. conradi by Shuttleworth in 

 1856. This has been referred by Tryon, in 1872, to Tampa Bay, 

 but the species was undoubtedly exotic and should be expunged 

 from American lists. 



■? Cardita (Carditamera) pectunculus Bragui^re, 1792. 



Gulf of Paria, Guppy; South America, Hanley; Madagascar, 

 Reeve (?). 



I feel some doubt as to the species thus named by Guppy, having 

 seen no specimens. Lister's shell so named by Bruguiere may have 

 been a large specimen of C. gracilis. The shell figured under this 

 name by Reeve is almost certainly the West American C. affinis 

 Broderip, and his locality erroneous. 

 ^Cardita (Carditamera) minima Guppy, 1867. 



West Indies ; Trinidad ? Guppy. Also Pliocene. 



A small, apparently immature species from Matura, Trinidad, 

 is listed by Guppy in 1867 and 1874 among his Pliocene species, 

 and noted as occurring also in the Recent state. These might well 

 be the young of C. gracilis. 

 Cardita (Glans) dominguensis Orbigny, 1853. 



Cuba and St. Domingo, Orbigny; Cape Hatteras, N. C, and 

 southward to Florida and the Gulf of Mexico, in 36 to 124 fathoms; 

 U. S. Fish Commission steamer ' ' Albatross. ' ' 



Readily recognizable by its squarish form with bright and vari- 

 able yellow, red and brown coloration in the southern part of its 

 range. 

 Venericardia (Cyclocardia) borealis Conrad, 1S31. 



Ashe Inlet, Hudson Strait, R. Bell ; Labrador, Stearns, in 3 to 

 10 fathoms; and southward in gradually increasing depths of water, 

 as the surface grows warmer, to the vicinity of Cape Hatteras, 

 where it has been found living to the depth of 250 fathoms, and 

 dead valves to 435 fathoms ; the latter may, however, have been 

 disgorged by fishes after the digestion of the soft parts. 



This species has been referred to Say's V- granulata, a Miocene 

 form which is smaller, more ventricose and less oblique, with fewer 

 ribs. It is, in part, the Arctiirus riidis of Humphrey (MS.), 



