153 



suture to the keel, marked with numerous fine decus- 

 sated arched longitudinal ribs which are coarser above 

 than below ; under side with a central cavity from 

 which the whorl extends a little convex to the keel ; 

 aperture suborbicular, outer lip thin, the inner reflected. 

 In shell sand at Noss Zetland, after a storm. 



GENUS. VELUTINA. 



Aperture circumscribed, no pillar, body-lip oblique. 



V. L^VIGATA. F. p. 326. HELIX L. Lin. 1250. 

 Don. 3. t. 105. Walk. f. 17 .Pen. 4. t. 86. /. 

 139. Mont. p. 382. and Sup. p. 140. Lin. T. p. 

 222. Dor. Cat. p. 56. t. 18. /. 9.D. p. 971. 



Thin, fragile, imperforate, subpellucid, flesh-colored, 

 with eight volutions, the body whorl extremely large, 

 the others very small very little produced and lateral ; 

 apex compressed ; transversely wrinkled and slightly 

 striated longitudinally or spirally, covered when fresh 

 with a rough brown epidermis which generally rises 

 into regular equidistant membranaceous spiral ridges ; 

 aperture suborbicular, dilated, margin thin. 0,60. 

 Shellness and Devon. 



V. OTIS. F. p. 326. HELIX OTIS. Turt. D. p. 70, 

 *-~-( Walk, t.l.f. 17)- -Semitransparent, glossy, whtfiis 

 3 



