40 



MOLLUSCA OF THK GuLF OF MEXICO 



lO 



Genus CAOULUS Philippi 



(PoSyschides) quadrldentatus Dall, Bull. M. C. Z. 9, p. 36, 1881; 



18, p. 428, pi. 27, f. 5, 1889; Bull. 37, U. S. N. M., p. 76, 

 pi. 27, f, 5, 1889; Henderson, Bull, in, U. S. N. M., pp. 97- 

 100, pi. 17, f. 2, 3, 1920. 



incisus Bush, Tr. Conn. Acad., 6, p. 471, pi. 45, f. 20, 1885; 

 Dall, Bull. 37, U. S. N. M., p. 76, pi. 41, f. 20, 1889. 



Distribution. — Hatteras to Rio de la Plata, 3-52, fms. Gulf 

 of Mexico: West Florida, 10-25 fms.; Yucatan Banks 25 

 fms. 



(Poiyschides) carolinensis Bush. In Verrill, Rept. Fish Com. (for 

 1883), p. 587, 1885; Tr. Conn. Acad., 6, p. 471, pi. 45, f. 



19, 1885; Dall, Bull. 37, U. S. N. M, p. 48 {pars), pi. 41, 

 f. 19, 1889; Pilsbryand Sharp, Tryon's Man. Conch., 17, p. 

 152, pi. 25, f. 64, pi. 30, f. 241-127, 1898; Henderson, Bull. 

 Ill, U. S. N. M., p. 102, pi. 17, f. 6, 7, 1920. 



Distribution. — Hatteras to Key West, 3-87 fms. Gulf of 

 Mexico, off Mobile, in 27 fms. 



(Platyschides) pocuiym Dall, BulL,M. C. Z,, 18, p. 429, 1889; 

 Bull. 37, U. S. N. M., p. 76, 1889 ; Pilsbry and Sharp, 

 Tryon's Man. Conch., 17, p. 172, pi. 33, f. 56, 57, 1898 ; 

 Henderson, Bull. 1 1 1 , U. S. N. M. , p. 108, pi. 17, f. 8,1920. 



Distribution. — Type found off St. Vincent, W. I., 424 fms. 

 A!so dredged, 640 fms., Yucatan Banks. 



(Platyschides) parvus Henderson, Bull, iii, U. S.N. M., p. 113, 

 pi, 18, f. 2, 4, 1920. 

 amiantus T)qX\, Bull. 37, U. S. N. M., p. 78, 1889. Net Dall's 

 typical amiantus. 



Distribution.— Off Barbados, 100 fms. (type) ; Yucatan 

 Banks, 1002 fms. \ 



(Platyschides) elongatus Henderson, Bull, iii, U. S. N. M., p. 

 122, pi. 19, f. 15, 1920. 



