139 Bulletin 38 , 169 



papiSIosus C. B. Adams, Proc. Bost. Soc. Nat. Hist,, p. 9, 1845; 

 Ball, Bull. 37, U. S. N. M., p. 172, '89; Pilsbry, Man., 14, 

 p. 114, pi. 21, f, 40, 41, 1S92; Ball and Simpson, Bull. U. S. 

 Fish Com., i, p. 453, 1901. 



Bistribution. — Tampa, West Florida, to St. Thomas, 

 W. I. 



Genus CHITOS^ Linnseus ' 



tuberculatus Linnaeus, Sj^st. Nat., ed. X, p. 667, 1758; Pilsbry, 

 Man., 14, p. 153, pL 33, f. 58-60, 1892; Ball and Simpson, 

 Bull. U. S. Fish Com., i, p. 453, 1901. 



Bistribution. — Texas and Florida to Trinidad and Ber- 

 muda. 



marmoratus Gmelin, Syst. Nat., p. 3205, 1792; Ball, Bull. 37, 

 U. S. N. M., p. 172, '89; Pilsbry, Man., 14, p. 158, pi. 34, 

 f. 72-76, 1892; Ball and Simpson, Bull. U. S. Fish Com., i, 

 p. 454, 1901. 



Bistribution. — Texas, and the Antilles to Barbados. South 

 to Cartagena, Colombia. 



Genus ACANTHOPLEURA Guilding 



granuiata Gmelin, Syst. Nat., p, 3205, 1792, (as C/nfon') ; Filshry , 

 Man., 14, p. 227, pi. 50, 1892; Ball and Simpson, Bull. U. 

 S. Fish Com., i, p. 454, 1901. 



puea Gmelin, Ball, Bull. 37, U. S. N. M., p. 174, '89. 



Bistribution. — Charlotte Harbor, West Fla., to Trinidad, 

 Bermuda and Bahamas. 



Genus ACAi^THOCH ITES Risso 



spiculosus Reeve, Conch. Icon., pi. 9, f. 47, 1847; Ball, Bull. 37, 

 U. S. N. M., p. 174, '89; Pilsbry, Man., 15, p. 22, pi. 13, 

 f. 60-62, 1893; Ball and Simpson, Bull. U. S. Fish Com., 

 I- P- 455, 1901. 



