"252 EMARGINULA. 



ward, somewhat grooved in the middle. Border of shell thin, 

 finely crenulated. 



Length 20, breadth 15, alt. 81 mill. ; length of slit 4, breadth 

 f mill. 



Length 15, breadth 101, alt. 6i mill. ; length of slit 3 mill.. 



St. Croix, West Indies. 



Two specimens of this exquisitely sculptured species are before 

 me, agreeing in all respects except size. The color is dull whitish. 

 It differs from E. cancellata Phil, in having the concentric threads 

 as prominent where they pass over the radii as in the interstices, 

 the radiating riblets less unequal in size and more than twice as 

 numerous, the cone more slender and graceful and the anal fasciole 

 more closely cross-striate. 



E. MULTISTRIATA Jeffreys. PI. 25, figs. 29, 30. 



Shell helmet-shaped, somewhat compressed at the sides, rather 

 thin, lusterless, and opaque ; sculpture, numerous slight ribs, which 

 radiate from the beak or apex to the front margin on every side ; 

 usually, but not regularly, a smaller alternates with a larger rib ; 

 the crests are studded with rather distant tubercles, giving a prickly 

 appearance ; the intervals between the ribs are filled with minute 

 and close-set transverse strise ; colour whitish ; margins slightly 

 notched by the termination of the ribs ; beak small, incurved, 

 placed perpendicularly to the front margin, slit short, but broadish; 

 the fissural furrow is filled up with crowded arched septa or plates; 

 inside glossy, showing the impression of the external sculpture. 



Length 0'5, breadth 0'3. (Jeffr.}. 



Mediterranean and Atlantic, off W. coast Spain, 217-374 fms. 

 ' E. multistriata JEFFR.. Ann. Mag. N. H. 1882, p. 30 ; P. Z. S. 

 1882, p. 680, t. 50, f. 12. 



This differs from E. cancellata Ph., in being proportionally higher, 

 narrow or compressed at the sides, and thinner; the beak over- 

 hanging the front margin ; the ribs are slighter and more numerous, 

 and the intermediate strise twice as many. It is also distinct from 

 E. tuberculosa Libassi, and E. confusa Seg., in sculpture and other 

 respects. 



E. FISSURA Linne. PI. 25, figs. 17, 18, 19, 20 ; pi. 29, figs. 25, 26, 



27. 



Shell usually raised, so as to give a height in proportion to the 

 length as 2 to 3, solid, opaque, not glossy ; sculpture, 25-35 strong 

 but narrow and cord-like ribs, which radiate from the beak to the 



