Bulletin- 38 39 



Distribution. — East and West Atlantic. A deep! water 

 species of wide range. Gulf of Mexico: Yucatan Strait. 

 640 fms. 

 (Sathoxiphus) didymum Watson, Jour. Linn. Soc. London, 14, ]). 

 517, 1S79; Henderson. Bull, iii, U. S. N. M., p. 83, pi. 14. 

 f. 10, 1920. 



Distribution. "Culebra Isl. and Barbabos. Doubtful specimen, 

 Yucatan Banks, 25 fms. 



(Compressldens) pressum Pilsbr}' and Sharp, Tryon's Man. Conch. 

 17, p. 124, pi. 7, f. II: pi. 22, f. 50-52, 1897; Henderson. 

 Bull, III, IT. S. N. M., p. S3, pi. 14, f. 3, 6, 8, 1920. 



com press a »i Wsitson, Jour. Linn. Soc. London, 14, p. 516, 1879: 

 Dall, Bull. M. C. Z., 9, p. 38, 1881; Watson, Chall. Rept. 

 (Scaph.), p. 9, pi. I, f. 9, 1885; Dall, Bull. 37, U.S.N. M.. 

 p. 76, 1889. Not compressuDi of d'Orbigny, 1850. 



Distribution. — Florida to the Antilles. Gulf of Mexico: 

 Off Cedar Keys, 196 fms.; between Mississippi delta and 

 Cedar Keys, Fla. 



(Compressidens) ophiodon Dall, Bull. M. C. Z.. 9. p. t^"^, iSSi; 18. 

 p, 427, pi. 26. f. 9, 1889; Bull. 37, V. S. N. M.. p. 76.pl. 

 26, f. 9, 1S89 ; Henderson, Bull, iii, U. S. X. M., 84, pi. 

 14, f. 2, 1920. 



Distribution. — Florida to Barbados. Gulf of Mexico: West 

 Florida, 169 fms. 



quadrangulare Harris, Bull. Amer. Paleontology, vol. i, p. 95, 



1895. Upper Pliocene, Galveston well at 2465-2871 feet 



(Harris). 

 tetragonum Sowerby, Thesaurus Conch., 3, p. 103, pi. 224. f. 



21, 22, i860. Upper Miocene, Galveston well, at 2158- 



2920 feet (Harris). 



Remark. — A fragment of an undetermined. Pleistocene, Dcn- 



talium was obtained from Knapp's No. 2 well, Terrebonne 



Parish, La. at 11 90- 1430 feet. 



