36 MOLLUSCA OF THE GULF OF MEXICO 



Disti-ibntion — Hatteras to Cuba, 22-182 fms. Type dredged 

 between Mississippi delta and Cedar Ke3^s in 30 fms. 



(Antalis) barlletti Henderson, Bull, iii, U. S. N. M., p. 55, pi. 

 8, f. 2,7, 1920. 



a7itillar2tm Dall, Bull. M. C. Z. , 9, p. 37, 1881 ; Bull. 37, 

 U. S. N. M.. p 76 {pars), 1889. Not antillariim d'Or- 

 bigny, 1846. 



Note. — True antillarnm is semi-littoral while bartletti is in 

 deeper, colder waters. 



Distribution. — Florida to Martinique. Gulf of Mexico: Be- 

 tween Mississippi delta and Cedar Kej^s, 227 fms.; Yucatan 

 Banks, 399 fms. 



(Heteroschisma) GaSIithrix Dall, Bull. M. C. Z., 18, p. 427, pi. 27, 

 f. 10, 1889; Bull. 37, U. S. N. M.,p. 76, pi. 27, f. 10, 1889; 

 Pilsbry & Sharp, Tryon's Man. Conch 17, p. 62, pi. 7, f. 3, 

 1897; Henderson, Bull, in, U. S. N. M., p. 57, pi. 8, f. 3. 

 4, 6, 1920. 



Distribution — North Carolina to off Rio de la Plata, Ar- 

 gentina. Gulf of Mexico: Between Mississippi delta and 

 Cedar Keys, 1 181 fms.; Yucatan Strait, 640 fms. (type lo- 

 cality) . 



(Fissidentalium) meridionale Pilsbr}^ and Sharp, Tryon's Man. 

 Conch., 17, p. 73, pi. 15, f. 32-34, 1897, (as variety of <:i3!7z- 

 didum); Henderson, Bull, in, U. S. N. M., p. 61, pi. 9, f. 



2, 1920. 



ceras DsAl, BnW. M. C. Z. 9, p. 37, i88i;i8, p. 425, 1889; 

 Proc. U. S. N. M. 12, p. 294, 1889. Not ceras Watson. 



Distribution — Tj^pe dredged by the Albatross, 240 miles south- 

 east of Rio de Janeiro, 671 fms., 37° temperature bottom. 

 Also found Yucatan Banks, 1568 fms. and off Barbados. 

 The largest Dentalium of the western Atlantic and charac- 

 terized by its unique, ashen color. 



