158 CADULUS. 



Creseis cyathus DE CRISTOFORI & JAN, Catal. rer. Nat., p. 1. 

 Cadulus ovulum var. attenuata MONTERSATO, Notizie Conch, foss. 

 Monte Pellegrino e Ficarazzi,p. 27 (no description). Cadulus cya- 

 thus C. & J., MONTS., Nuova Rivista, p. 21. C. " alternates " 

 Monts., JEFFREYS in coll. 



Fossil at various points in the Pliocene. Smaller than C. ovulum, 

 not so swollen in the middle of the dorsal part. This is the form 

 found living in the Mediterranean. It is apparently quite distinct 

 from C. ovulum. We have not seen Cristofori & Jan's catalogue, 

 and adopt the name cyathus from Monterosato, who identifies his 

 C. ovulum var. attenuata with that species. 



The figures represent lateral, ventral and apical views, and out- 

 lines of aperture and " equator." 



C. AMPULLACEUS Watson. PL 25, fig. 58. 



Shell small, rounded, but not symmetrical in its two curves, con- 

 tracted in front, pinched in behind so as to form a short tube, swol- 

 len, the fullest bulge lying behind the middle. Pretty strong, 

 polished and translucent white, with an opaque band close to the 

 apex ; sculpture none ; mouth large, very slightly oblique ; edge 

 thin and chipped. Apical opening slightly oval, small, straight, 

 roughened, narrowed inside by a flat, concentrically puckered and 

 margined ring, which occupies nearly half its diameter (0*014 and 

 0*006 inch). The margin (about 0*001 thick) of this ring is formed 

 by the projecting end of a short pipe (about 0*005 long) which 

 passes up into the interior of the shell. Length 0*08 inch, breadth 

 at mouth 0*02, at broadest 0*047, at apex O'OIG inch. (Watson). 



Culebra Island, West Indies, 390 fms. (Challenger). 



Cadulus ampullaceus WATSON, Journ. Linn. Soc. Lond., xiv, p. 

 529 (1879) ; Chall. Scaph.,p. 23, pi. 3, f. 11 (1885). 



This species is not only much smaller than C. ovulum Phil., from 

 the Mediterranean, but is obviously very different in form and pro- 

 portions. It differs from C. exiguus Wats, in being much rounder, 

 has no tube anteriorly, is not nearly so elongated posteriorly, and 

 is provided with a distinct posterior pipe. ( Wats.~). 



I think it not impossible that C. gibbus, which I know only from 

 description and figures, may turn out to be my C. ampullaceus. 

 ( Wats.). 



