152 
de Cog.—Mag. N. H.7. p. 352.—D'orb. Mol. Cub. 
—Drorb. Mol. Amer.—Bl. t. 37. bis. f. 1.—Oval, a 
little swollen and slightly carinated in the middle, 
violet, marked with very oblique elegant longitudinal 
strize which turn at the subcarinate part in an obtusely 
angular direction ; spire produced and pointed. 0,40... 
0,30. Land's End, Cornwall, very rare.-—More coni- 
cal than Fragilis, the whoris rounded and more dis- 
tinctly defined, the mouth not so proportionately 
spread, by which it appears somewhat spindle shaped. 
I. Parra. Thompson's Annals of Nat. Hist. 5. pe 
96.¢.2. f.2.—An. I. Nivens. Phil.t.9.f. 16?—Ovate, 
obtuse, pale, all the whorls strongly rounded, the suture 
deep ; aperture large, longer than broad, semiovate, 
columella curved, outer hp rounded and acutely edged. 
3. Clare. 
Grnus.—SCISSURELLA. Dorbieny. 
Shell with a denressed spire, the outer lip notched with 
a deep slit following the growth ef the volutions, 
obliterated to within a short distance of the margin 
and forming a sort of keel upon the back of the shell. 
S. Crispata. Fleming. p. 366:—White; whorls 
three, increasing rather rapidly from the slightly ele- 
vated apex and sloping with a gentle convexity from the 
