172 CADULUS-GADILA. 



Cadulus pandionis V. & S., Verrill, Amer. Journ. Science, xx, 

 pp. 392, 399 (Nov. 1880) ; Proc. U. S. Nat. Mus., iii, p. 395 (1880) ; 

 Trans. Conn. Acad., v, p. 558, pi. 58, f. 30, 30a ; Rep. Commissioner 

 Fish and Fisheries, for 1883, appendix D, Nat. Hist., p. 573 (71), 

 pi. 28, f. 126 (1885). 



C. pocuLUM Dall. PI. 33, figs. 56, 57. 



Shell salid, opaque white, strongly arcuate, the bend mainly in 

 the posterior half. Equator at the anterior fifth, the swelling being 

 short and high, sxibavgular on the convex side, in front of it the tube 

 is conspicuously compressed between the convex and concave sides, 

 and behind it regularly tapering to the apex ; outline of the concave 

 side slightly convex in the region of the equator, elsewhere concave ; 

 lateral outlines much contracted above. Surface polished, smooth. 

 Apertu7'e extremely oblique, siibciicuiar, but if viewed from above in 

 the line of the axis of the latter part of the shell, appearing trans- 

 versely elliptical. Anal orifice small, subcircular, with thick, slitless 

 walls. 



Length 12"2, antero-posterior diameter at aperture 1'2, at equa- 

 tor 211, at apex 0'8 mill.; lateral diam. at aperture 1"65, equator 

 2-45, apex 0-83 mill. 



Off Cape San Antonio, Cuba, in 640 fms. ; near St. Vincent, West 

 Indies, in 464 fms. (Blake). 



Cadulus poculum Dall, Bull. Mus. Comp. ZooL, xviii, Blake Rep., 

 15.429(1889). 



The figures represent the lateral and convex aspects. " This spe- 

 cies is remarkable for the obliquity of the equator and of the slope 

 on the convex side from the summit to the anterior margin. In 

 these particulars it is more strongly marked than any other species 

 I have seen." C. platystoma is stouter and not angularly hump- 

 backed like C. poculum. Figures and description from a specimen 

 in National Museum. 



C. vuLPiDENS Watson. PI. 25, fig. 51. 



Shell like the canine tooth of a small Carnivore, long, sharp, bent, 

 swollen (a little obliquely) toward the mouth. The swelling is 

 greatest on the convex curve, and lies there a little nearer the end 

 (about one-fourth of the length) than it does on the concave, where 

 it is at about one-third of the length. The obliquity makes the form 

 a little unsyrametrical. From the swelling the shell contracts more 

 rapidly towards the mouth. Toward the apex the bend increases. 



