166 CADULUS-GADILA. 



Canaries, 1,125 fms. (Challenger). Of Cape Hatteras in 843 fms. 

 (U. S. Fish Commission). 



Cadulus gracilis JEFFREYS, Ann. Mag. N. H. (4), xix, p. 157 (Feb. 

 1877), and (5), vi, p. 375 (1880) ; P. Z. S., 1882, p. 664, pi. 49, f. 7. 

 WATSON, Challenger Rep., p. 20, pi. 3, f. 5 (1885). BALL, Bull. M. 

 C. Z., xviii, Blake Rep., p. 432 (1889). 



It is very like C. jeffreysi Monts., but is larger and a little more 

 compressed (in the proportion of yV) between the convex and con- 

 cave curves as compared with its breadth, which is not the case in 

 C. jeffreysi. It is not so swollen, and the posterior opening is larger 

 than in that species (Watson). 



C. PROPINQUUS G. O. Sars. PI. 24, figs. 27, 28. 



Shell rather solid, pellucid, glassy, slightly curved, conspicuously 

 fusiform, the middle moderately swollen, ventral [convex] side 

 equably arcuate, dorsal side slightly rising in the middle : anteriorly 

 tapering. Aperture little oblique, suddenly contracted behind ; 

 apical orifice much narrower than the mouth, circular, with entire 

 margin. Surface very smooth and shining, generally with a sub- 

 opaque zone anteriorly ; there is a readily observable internal, sub- 

 apical annular fold. Length 3'2, diam. 1 mill. (G. O.Sars). 



Finmark and west coast of Norway, 100-450 fms. (Sars); Say of 

 Biscay (Travailleur Exped.). 



Cadulus propinquus G. O. S., Moll. Reg. Arct. Norv., p. 106, pi. 

 20, f. 15 a-b, and pi. I, f. 5, dentition (1878). JEFFREYS, Ann. 

 Mag. N. H. (5), vi, p. 375 (1880) ; P. Z. S., 1882, p. 664. Not C. 

 propinquus Verrill, Trans. Conn. Acad., v, p. 558, pi. 58, f. 31, 32. 



C. CYLINDRATUS Jeffreys. PL 24, fig. 26. 



Shell forming a narrow cylinder, slightly contracted at each 

 end, gently curved, thin, transparent and glossy ; sculpture none, 

 except a few microscopic and faint lines of growth. Mouth some- 

 what obliquely truncated, but not thickened ; base circular, with 

 numerous minute notches, which are not perceptible to the naked 

 eye. Length 0'325, breadth 0'075 inch. (Jeffreys}. 



Off west coast of Ireland, 1,215-1,475 fms. (Porcupine Exped.); 

 Bay of Biscay, 652-1,450 fms. (Travailleur Exp.). 



Cadulus cylindratus JEFFR., Ann. Mag. N. H. (4), xix, p. 158 

 (1877) ; P. Z. S., 1882, p. 664, pi. 49, f. 6 ; Ann. Mag. N. H. (5), 



