93 BlXLETlN 38 T23 



cylindre'la Dall, Bull. M. C. Z., 9, p. 83, 1881; 18, p. 250, pi. 20, 

 f. 6, '89; Bull. 37, U. S. N. M., p. 138, pi. 20, f. 6. '89. 



Distribution. — Cape San Antonio, Yucatan Strait, 640 

 fms. 



Genus CERITHSOPSIS Forbes and Hanley 



greenei C. B. Adams, Jour. Bost. Soc. N. H., 2, p. 287, pi. 4, f. 

 12, 1839, (as Cerithiiini) \ Dall, Bull. 37, U. S. N. M., p. 

 138, pi. 52, f. 2, '89; Tr. W. I. S., 3, p. 269, '92; Johnson, 

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



Distribution. — Prince Edward Island to Dominican Repub- 

 lic and west of Cedar Keys, Fla. , Corpus Christi and San 

 Antonio, Texas. 3-10 fms. Pliocene, Caloosahatchie River, 

 Florida. 



crystallina Dall, Bull, M. C. Z., 9, p, 89, 1881; 18, p. 254, pi. 20, 

 f. 3, '89; Bull. 37, U. S. N. M., p. 138, pi. 20, f. 20, f. 3, 

 '89; Dall and Simpson, Bull. U. S. Fish Com., i, p. 424, 

 1901. 



Distribution. — Washed ashore dead, Cedar Keys, Florida, 

 dredged alive west of Florida in 50 fms. Common in An- 

 tillean dredgings. 50-805 fms. 



martensi Dall, Bull. M. C. Z., 18, p. 255, pi. 20, f. 2, '89; Bull. 

 37, U. S. N. M,, p. 138, pi. 20, f. 2, '89. 



Distribution. — Gulf of Mexico, west of Florida, at 1181 

 fms. 



vanhyningi Bartsch, Pr. Biol. Soc. Washington, 31, p. 135, 

 1918. 



Distribution. — Tampa Bay, West Fla. 



burkevillensis Dall, Pr. U. S. N. M., 46, p. 231, pi. 22, f. 5, 

 1914. 



Di stribution. — Upper Miocene or Lower Pliocene, Burke- 

 ville, Texas. 



