158 
Grenvus.—C Y CLOSTRE MA. FLeming, 
Spire short ; transverse ridges on the body whorl, 
disjoined from the pillar by a crenulated groove. 
C. Zetianpica. F. p.312.—Mont. Lin. T 11. p. 
194. #. 13. f. 3.—Conical, white, apex obtuse, whorls 
five, tumid, ribbed spirally and longitudinally, with 
angular tubercles at the point of decussation, the spiral 
ridges most prominent at the base where the longitu- 
dinal ones disappear; aperture nearly orbicular and 
marginated. 0,18. Zetland. 
Genus.—SKENEA. FLEMING. 
Spire depressed and destitute of spinous processes ; 
suture deep. 
S. Drpressa. F. p. 313.—SrerpuLta Cornea. 
Adams. Lin. f.5. t. 1. f. 33.—HeE11x D. Mont. p. 
439. ¢. 18. 7.5.—Brown, whorls three or four, rounded, 
wrinkled across, with a deep groove for the separating 
line; above, the whorls are nearly on a level, their cen- 
tral edge bending suddenly at the suture and forming a 
deep groove ; beneath, with a large central cavity ex- 
posing the volutions; aperture circular, detached from 
the body whorl, sometimes slightly reflected. 0,08. 
At the roots of Fuci, not uncommon. 
S. Serrurompes. FE, p. 313.—Herix 8. Mont, 
