160 CADULUS. 



chipped. Apical opening small and straight, chipped, narrowed 

 inside by a minute shelf-like projecting ring. Length (H09 inch, 

 breadth at mouth 0'02, greatest 0'04 ; at apex O'Ol inch. ( Watson). 



Lat. 18 3$ 30" N., Long. 65 5' 30" W. Culebra Island, West 

 Indies, 390 fathoms (Challenger). 



C. obesus WATSON, Journ. Linn. Soc. Lond., xiv, p. 527, 528 

 (1879); Chall. Report, Scaphopoda, p. 22, pi. 3, fig. 8. DALL, 

 Bull. Mus. Comp. Zool., ix, p. 36 ; " Blake '' Scaphopoda, BulL 

 Mus. Comp. Zool., xviii, p. 431. 



This is nearly of the same proportions as Cadulus curtus except 

 being very much broader ; like that too, it is narrowed laterally. I 

 have hesitated very much in making it more than a variety, but on 

 the whole, think it safer to reckon it as distinct. One specimen has 

 its width exaggerated by a gibbous pad of enamel. ( Watson). 



C. TUMIDOSUS Jeffreys. PI. 25, figs. 67, 68, 69. 



Shell forming a short spindle, slightly bulging in the middle on 

 the lower or more concave part, and very gibbous on the back or 

 outside, somewhat curved, contracted towards both ends, but much 

 narrower at the base, rather solid, glossy and semitransparent. 

 Sculpture none, except microscopic and close set lines; color whit- 

 ish ; mouth roundish-oval, obliquely truncated or sloping to the 

 back ; the inner margin is furnished with a slight circular rib or 

 thickening like that in many species of Helix ; base notched on each 

 side, as in C. subfusiformis. Length 0*2, breadth 0*075 inches. (Jef- 

 freys'). 



Channel Slope, 557 fms. (Porcupine Exped.) ; Bay of Biscay, 

 292-1095 fms. (Josephine Exped.) ; Azores, 1000 fms., and Cana- 

 ries, 1125 fms. (Challenger) ; 90 miles N. of Ceara, Brazil, in 1019 

 fms. (Albatross) ; Fossil in Pliocene at Messina (Seguenza). 



Cadulus tumidosus JEFFR., Ann. Mag. N. H. (4), xix, p. 156 

 (1877); P. Z. S., 1882, p. 665, pi. 49, f. 8; Ann. Mag. N. H. (5), 

 vi, p. 317 (1880). WATSON, Chall. Rep., p. 22, pi. 3, f. 9 (1885). 

 DALL, Proc. U. S. Nat. Mus., xii, p. 295 (1890). 



This is much larger and more gibbous than C. subfusiformis, and 

 like that species, it varies in shape and size. It has the character 

 on which Monterosato lays stress in generically separating C. sub- 

 fusiformis from C. ovulum, viz., in the mouth or anterior opening 

 being more or less thickened inside by a circular rib. Some speci- 

 mens are faintly or indistinctly striated lengthwise. (Jeffr.). 



