152 



de Coq.Mag. N. H. 7. p. 352. D'orb. Mol Cub. 

 D'orb. 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 

 striae 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 whorls rounded and more dis- 

 tinctly defined, the mouth not so proportionately 

 spread, ly which it appears somewhat spindle shaped. 



I. PALLIDA. Thompson's Annals of Nat. Hist. 5. p. 

 96.t3.f.2.An. I. NITENS. PhiU.9.f. 16? Ovate, 

 obtuse, pale, all the whorls strongly rounded, the suture 

 deep ; aperture large, longer than broad, semiovate, 

 columella curved, outer lip rounded and acutely edged. 

 I. Clare. 



GENUS. SCISSURELLA. D'ORBIGNY. 

 Shell with a depressed spire, the outer lip notched with 

 a deep slit following the growth ef the volutions t 

 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 t gentle convexity from the 



