150 BULLETIN 90, UNITED STATES NATIONAL MUSEUM. 



Genus ANOMALOCARDIA Schumacher. 



Anomalocardia Schumacher, Essai, pp. 44. 134, 1817; Venus fluctuosa 



Linnaeus. — Gray, Proc. ZooL Soc. London, for 1847, p. 183. 

 Triquetra Anton, Verzeichn., p. 10, 1839. same type. 

 Cryptogramma Morch, Yoldi Cat., voL 2, p. 22, 1853. E'ir.st species, Venus 



suhrugosa Wood. 

 Anomalocardia Deshayes, Cat. Con. Brit. Mus., vol. 1, p. 115, 1853. — 



Dall, Proc. U. S. Nat. Mus., vol. 26, p. 359, 1902 ; Trans. Wagner Inst.. 



vol. 3, pt. 6, p. 1301, 1903; not Anomalocardia H. and A. Adams, 1858 



(Arcidae). 



ANOMALOCARDIA FLORIDANA Conrad. 



Plate 23, figs. 4. 5. 



Venus floridana Conrad, Amer. Journ. Sci., ser. 2, vol. 2, p. 400, fig. — , 1846. 

 Venus penita (part) Heilprin, Trans. Wagner Inst., vol. 1, p. 116. 1887. 

 Anomalocardia floridana Dall, Trans. Wagner Inst, vol. 3, pt. 6, p. 1303, 

 pi. 55, figs. 14, 15, 1903. 



Oligocene of the Tampa silex beds at Ballast Point, Tampa Bay, 

 and of the overlying Tampa limestone; of the limestone at Bailey's 

 Mill Creek sink, and of the Sopchoppy, Forida, limestone. Figured 

 specimen, U. S. Nat. Mus. N'o. 165214. 



This is the most common, characteristic, and oldest known bivalve 

 of the silex beds. Its numerous variations of form have been tabu- 

 lated in the Wagner Transactions. 



A. penita Conrad, described at the same time from a cast in the 

 Tampa limestone, has not been recently identified, but Heilprin 

 united it, possibly prematurely, with A. ■floridana., though Conrad's 

 figure indicates some differences. 



Genus VENUS (Linnaeus) Lamarck. 



Venus (part) Linnaeus, Syst. Nat, ed. 10, p. 685, 1758; ed. 12, p. 1128, 1767. 



Pectunculus Da Costa (part) Brit. Conch., p. 184, 1778, not of Huddesfoi-d, 

 in Lister, Coucb. Anat. Index, p. 5, expl. pi. 13, fig. 1, 1770.= 

 Cardium edule Linnaeus. 



Venus Lamarck, Prodrome, p. 84, 1799. Sole example, V. mercenaria Lin- 

 naeus.— Dall, Trans. Wagner Inst., vol. 3, pt. 6, p. 1306, 1903. 



Mercenaria Schumacher, Essai, pp. 45. 135, 1817, same type. Not Mer- 

 cenaria Cossmann, 1887. 



Crassivenus Perkins, Proc. Boston Soc. Nat. Hist., vol. 13, p. 147, 1869, 

 same type. 



VENUS HALIDONA Dall. 



Plate 26. figs. 3, 5. 



Venus halidona Dall, Trans. Wagner Inst., vol. 3, pt. 5, p. 1194, pl» 38, 

 figs. 1, la, 1900 ; pt. 6, p. 1307, 1903. 



Oligocene of the Tampa silex beds at Ballast Point, and of the 

 limestone of Hillsboro Bay in Tampa Bay, Florida. Dall, Burns, 

 and Willcox. U. S. Nat. Mus. No. 165217. 



