1902.] NATURAL SCIENCES OF PHILADELPHIA. 705 



Venericardia (Cyolocardia) moniliata Call, 1W2. 



East of Rio Janeiro, in 59 fathoms, mud, bottom temperature 

 57° F. ; U. S. FL^h Commission steamer " Albatross." 



Small, with rather large, distinctly limited, smooth lunule and 

 escutcheon, and about 24 slender, closely beaded radial ribs, with 

 subequal striated interspaces. 



Venericardia (Pleuromeris) tridentata Say, 1826. 



Off Cape Hatteras, X. C, and southward to Florida and the 

 Gulf of Mexico, in 36 to 124 fathoms. 



This is not the species figured by Reeve in 1843 under this 

 name. The latter is an exolic. The present species is also found 

 fossil in the Miocene and Pliocene Tertiary marls of the Atlantic 

 coast. . 



Venericardia (Pteromeris^ perplana Conrad, 1841. 



Cape Hatteras, N. C, and southward to Florida and the Gulf 

 of Mexico, from near low water to 52 fathoms. Ako Upper 

 Miocene and Pliocene of the Carolinas. 



Small, oblique, wing-shaped, compressed and radially ribbed ; 

 sometimes rather bright-colored and always variable. V. obliqua 

 Bush, 1885, is synonymous, and Conrad, after describing the fossil 

 as a Cardita, put it, in 1845, in the genus Astarte, and, because of 

 an earlier Astarte perplana, changed the specific name to radians. 

 A year later he named the recent shell from Tampa Bay Astarte 

 flabel/a. A shorter, more feebly sculptured form from the York- 

 town and Duplin Miocene he named Cardita abbreviata, but tliis 

 while the ruling form in the earlier beds is gradually supplanted 

 by V. perplana, and 1 have not seen it in the Recent slate. 



Carditopsis smithii Dal), 18%. 



Bermuda. 



This is figured under the name of Cardita doming uemit Orbigny 

 in the list of marine mollusks added to the fauna of the Bermudas 

 by Verrill and Bush in Trans. Conn. Acad. Sci., X, p. 517, PI. 

 LXIII, figs. 6, 7, 8, 1900. It is a minute brownish shell, subtri- 

 gonal in shape, with beaded radial sculpture and an internal 

 resilium. Xo species of Cardita or Venericardia has as yet been 

 identified from Bermuda. 



