I07 MOLLUSCA OF THE GuLP OF MEXICO 75 



228, 1854. Not of Sowerby, 1829 ; nor Munster, 1836. 

 trapezoidalis Kurtz; Cat. Sh. N. & S. Car., p. 5, i860. 

 pygmcBa Hilgard, House of Rep., Ex. Doc. i, pt. 2, pp. 887, 

 890, pi. 3, f. I, 1878, (as Tapes); Dali, (in part), Bull. 

 37, U. S. N. M., p. 54, '89, (as Venus); Vanatta, Proc. 

 A. N. S. Phila., 55, p. 757, 1903. l^oX pygmtza oi\^-^- 

 marck, An. s. Vert., 2d ed. 6, p. 337, 1818. 



Note.— The true /jj'^/«^<^ Lam., of the Florida reefs and An- 

 tilles is closel}^ related but larger than grus. Its synonym 

 is V. incequivalvis d'Orbigny, 1853. 



Distribution. — Hatteras to Yucatan, 12-63 f^^is. Miocene to 

 Recent. Gulf coast.— Recent : Ft. Barranca, St. Joseph's 

 Bay, Crooked Island, Fla. ; Horn Island, Miss. Pleisto- 

 cene : New Orleans pumping station No. 7, New Orleans 

 Gymnasium well at 1200 feet ; Knapp's No. 2 well, Ter- 

 rebonne Parish, 1434-1519, 1542-1632, 1780-1790, 1791- 

 1842 feet ; Bush-Johnson well at Logtown, Miss., at 280 

 feet. Pliocene : Caloosahatchie and Shell Creek, Fla. 



Genus ANOIVIALOCARDIA Schumacher 

 brasiJiana Gmelin, Syst. Nat. 6, p. 3289, 1792, (as Ve7ius); Dall, 

 Proc. U. S. N. M., 26, p. 375, 1903 ; Tr. W. I. S., 3, p. 

 1306, '03. 

 flexuosa Born, Test. Mus. Vind., p. 62, pi. 4, f. 10, 1780, (as 



Venus). Not of Linnaeus, 1767. 

 macrodon Lamarck, An. s. Vert., p. 580, 1818 ; Hanley, Bio. 

 Sh., p. 116, pi. 9, f. 7, 1843 ; Sowerby, Thes. Conch., 2, 

 p. 717, pi. 156, f. 88, 1853. 

 /zmz^/arzj' Lamarck, 1818, Deshayes, '34, Philippi, '44. 

 Distribution. — North Carolina to Rio de Janeiro. Gulf coast. 

 Pleistocene: Osprey, West Fla. (Dall). Pliocene: Shell 

 Creek, South Fla. 

 cuneimeris Conrad, Proc. A. N. S. Phila., vol. 3, p. 24, pi. i, f. 

 13, 1846, fas Venus); Hilgard, House of Rep. Ex. Doc. i, 

 pt. 2, p. 890, pi. 3, f. 5, '78 ; Dall, Proc. U. S. N. M., 26, 

 p. 376, '03; Vanatta, Proc. A. N. S. Phila., 55, p. 757, 

 1903. 



