6o BuiXETiN 34 92 



Distribution — Hatteras to Rio de Janeiro, south through Straits 

 of Magellan to Chiloe Isl., Pacific Ocean. Pliocene (?) to 

 Recent. Gulf coast. — Crooked Isl., Fla. ; Horn Isl., 

 Miss., Galveston (?) 

 semiaspera Philippi, Wiegm., Arch. 1, p. 225, pi. 7, f. 2 a-d, 

 1836 ; Dall, Bull. 37, U. S. N. M., p. 52, '89 ; Mitchells 

 List Tex. Shells ; Dall, Tr. W. I. 3, p. 1188, 1900 ; Proc. 

 U. S. N. M., 23, p. 794, 1 901. 

 Lucina granulosa C. B. Adams, Proc. Bost. Soc. N. Hist., 

 2, p. 9, '45- 



Lucina semireticulata d'Orbigny, (in part), Voy. Am. Mer., 



p. 585, pi. 84, figs. 7-9, '46. 

 Distribution. — Hatteras to Rio de Janeiro, 14-20 fms. Gulf 



coast. — Texas (Mitchell); Pliocene: Caloosahatchie. 

 soror C. B. Adams, Contr. Conch., p. 247, 1852, (as Li icin a); 



Dall, Bull. 37, U. S. N. M., p. 52, '89 ; Tr. W. I., 3, p. 



1 188, 1900; Proc. U. S. N. M., 23, p. 794, '01. 

 kiawakensis Holmes, Post-Pi. Fos. S. C, p. 29, pi. 6, fig. 5, 



1858 ; Hilgard, House of Rep. Ex. Doc. 1, pt. 2, p. 887, 



1878. 



Distribution. — Texas to Jamaica. Pleistocene : Lake Borgne 

 borings, La. 



notata Dall and Simpson, Bull U. S. Fish Comm. 1, p. 495, 1901; 

 Dall, Proc. U. S. N. M., 23, p. 974, '01. 

 Distribution. — Marco, West Fla., to Porto Rico. 



Genus CYRENOIDA Joannis 

 floridana Dall, Bull. 37, U. S. N. M., p. 50, 1889, {Nomen nudem)\ 

 The Nautilus, vol. 10, p. 52, Sept. 1896, (Description). 

 Distribution. — Georgia to West Florida, — at Marco and Char- 

 lotte Harbor, in either brackish or tolerably salt marshes. 

 Recent. The Caloosahatchie Pliocene species is caloosaen- 

 sis Dall. 



Genus THYASIRA Leach 

 grandis Verrill and Smith, Trans. Conn. Acad., 6, 1885, ( as 

 Cryptodon); Dall, Bull. 37, p. 50, pi. 46, f. 22, '89; Proc. 

 U. S. N. M., 23, p. 785, 1901. 



