370 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvi. 



AMIANTIS (EUCALLISTA) PURPURATA Lamarck, 1818. 



Cuba (Arango) and southward to Brazil. 



This is Oytherea lubrica Deshayes, 1853, but not of Broderip, 1835; 

 and was named Ohione purpurascens by Gray, 1838. It is not Venus 

 purpurata Gmelin, 1792, but is Venus hrasiliensis var. /5 of Guielin. 



CALLOCARDIA VESICA Dall, 1886. 



Gulf of Mexico to Barbados, in 84 to 175 fathoms. 

 White and concentrically grooved with isocardia-like beaks. De- 

 scribed as Oytherea ( Veneriglossa) vesica. 



CALLOCARDIA (AGRIOPOMA) TEXASIANA Dall, 1892. 



Coast of Texas from Galveston to Indianola. 



Resembles the following species, but is larger, much more elongate, 

 and with a narrower lunule. Described as Oytherea texasiana. 



CALLOCARDIA (AGRIOPOMA) MORRHUANA Linsley, 1848. 



Prince Edward's Island, and southward to the vicinity of Cape Hat- 

 teras. North Carolina, in 10 to 107 fathoms. 



Rounded trigonal, earthy white, with fine inosculating, concentric 

 wrinkling externally. This species has long been confounded with 

 the fossil Oytherea convexa Say, 1824, not of Brongniart, 1811; which 

 name was replaced hy Conrad in 1833 by O. sayana. Both names 

 have been applied to the present shell, which has also been called O. 

 sayii by Perkins, 1869. O. morrhuana has lower beaks, a narrower 

 and more delicate hinge plate, and is in general less trigonal than the 

 Miocene fossil. Linsley's name was given to a very young shell, with- 

 out description, and subsequently identified b}^ Dr. Gould from Lins- 

 ley's specimens. It has been proposed to use the name Sayana for the 

 recent shell, but this is clearly inadmissible, and Conrad himself 

 retained it for the fossil after he decided that the two were not 

 identical. 



CALLOCARDIA (AGRIOPOMA) ARESTA Dall and Simpson, 1901. 



Porto Rico, in 12 to 30 fathoms. 



More porcellanous, inequilateral, and rostrate than the preceding 

 species. 



CALLOCARDIA (AGRIOPOMA) ZONATA Dall, 1902. 



North Carolina coast near Cape Hatteras, in 18 to 22 fathoms. 

 Small, trigonal, evenly concentrically grooved and zoned with vellow 

 brown. 



PITARIA ALBIDA Gmelin, 1792. 



From the Florida Strait through the West Indies and on the north- 

 ern shores of South America, in 4 to 25 fathoms. 



