294 CYLICHNA. 



closely punctured ; they are stronger at the base than at the crown ; 

 colour white ; spire deeply sunken, and for the most part concealed 

 in a small cavity in the center of the crown ; but the bulb-shaped 

 apex is visible at the bottom of the cavity ; mouth semi-oblong, con- 

 tracted above and expanding below ; outer lip slightly raised above 

 the crown and channelled, curved in the middle and at. the base ; 

 inner lip inconspicuous ; pillar straight on the upper half and in- 

 curved below. Length O2, breadth O'l inch. (Jejfr.). 



West of " Wyville-Thomson ridge," N. lat. 59 51' 2" W. Ion. 8 

 18', 570 fms. 



Cryptaxis crebripunctatus JEFFREYS, P. Z. S. 1883, p. 398, pi. 44, 

 f. 11. 



In the 'Annals and Magazine of Natural History ' for June, 1883 

 I indicated the probability that a species which was there described 

 and figured as a Cylichina parvula might be the type of a distinct 

 genus, intermediate between Cylichna and Utriculus, because the 

 spire was partly concealed ; and I suggested the name Cryptaxis. I 

 am now encouraged by the discovery of the present species to adopt 

 the above generic name. 



BULLINA ELONGATA Jeffreys, Ann. Mag. N. H. (5), vi, p. 318 

 and Rep. Brit. Asso. Adv. Sci. 1880, p. 387. Bay of Biscay. Name 

 only. 



Species of the east coast U. S., West Indies, etc. 



C. DOMITUS Dall. PL 48, fig. 12. 



Shell solid, yellowish-white, short, broad and squarely truncate in 

 front with a rather blunt mammiform spire exhibiting about three 

 turns ; surface transversely marked with faint lines of growth, and 

 near the suture with fine well-marked wrinkles, as if too large for 

 the spire around which the posterior fourth of the whorl is closely 

 wound and very strongly appressed, giving the posterior edge of the 

 last whorl especially a bevelled appearance; spiral sculpture, 

 extremely fine grooves, not puncticulate, strong on the posterior 

 aspect, obsolete on the body (which appears polished), and, except 

 in the young, on the anterior extreme; the sutural wrinkles are 

 prettily shagreened by the intersection of these fine close grooves ; 

 spire very obliquely wound, the margin of the volutions rounded 

 (notwithstanding its being closely appressed) and the rounded edge 



