9 1 Bulletin 38 I3I 



iconica Watson, Jour. Linn. Soc, 14, p. 589, 1879; Chall. Rept. 

 Gastr., 15, p. 107, pi. 7, f. 3, 1886; Tryon, Man., 9, p. 

 47, pi. 8, f. 77, 78, '87; Dall, Bull. M. C. Z., 18, p. 269, 

 1889. 



Distribution. — Gulf of Mexico, Florida Strait region, Culebra 

 IsL, W. I., and off the Azores. 390-1568 fms. 



Genus TRIPHORA Blainville 



perversa var. nigrocincta C. B. Adams, Jour. Bost. Soc. N. H., 2. 

 p. 286, pi. 4, f. II, 1839, {2J& Cerithmm); Gould, Inv. Mass., 

 p. 323, f. 592, 1870; Dall, Pr. U. S. N. M., 6, p. 333, '83; 

 Bull. 37, U. S. N. M., p. 138, '89; Singley, 4th Ann. Rept. 

 G. S. Tex., p. 338, '92; Dall, Tr. W. I. S., 3, p. 263, '92; 

 Johnson. Occ. Pa. Bost. Soc. N. H., 7, p, 126, 1915. 



Distribution. — Massachussetts to Barbados. 0-30 fms. Gulf 

 coast: Cedar Keys, Florida, Corpus Christi, Texas. Plio- 

 cene, Caloosahatchie beds, West Fla. 



decorata C. B. Adams, Contr. Conch., p. 177, 1850, (as Cerith- 

 him); Dall, Tr. W. I. S., 3, p. 265, 1892. 



Distribution. — Gulf of Mexico, north and east shores, and 

 the Antilles. Also Lower Miocene of the Chipola marl, 

 West Florida. Variety olivacea Dall, (Bull. M. C. Z., 18, 

 p. 244, 1889; Bull. 37, U. S. N. M., p. 138, '89), Gulf of 

 Mexico, west of Florida, in 50 fms. Also Key West and 

 Antilles. 



colon Dall, Bull. M. C. Z., 9, p. 86, 1881; 18, p. 247, pi. 20, f. 

 12, '89; Bull. 37, U. S. N. M., p. 138, pi. 20, f. 12, '89. 



Distribution.— Yucatan Strait, 640-1002 fms. Also off 

 Havana, Cuba, 450 fms. 



triserialis Dall, Bull. M. C. Z., 9, p. 84, 1881; 18, p. 246, pi. 20, 



