139 



p. 205. F. p. 292. Oval-oblong, thin, brittle, sub- 

 pellucid, yellowish brown with numerous transverse 

 striae of a lighter color giving the shell the appearance 

 of veined wood, apex depressed into a subumbilicus ; 

 aperture large extending the whole length of the shell, 

 contracted above; inside glossy white, columella visible 

 to the end. 2. Cornwall and Devon. 



B. AKERA. Gmel. 3434. Mont p. 219. .F. p. 

 292. (Xfl./. 1358.J V.p. 482. Dor. Cat. p. 43. 

 t. 22. f. 12. B. RESILIENS. Don.3. t. 79. B. FRA- 

 GILIS. Lam. 10. Bl. t. 45. f. 7. Oval, extremely 

 thin, pellucid, horn-colored, elastic, somewhat wrinkled 

 longitudinally ; apex obtuse, convoluted, canaliculated, 

 the volution even with the body ; aperture large at the 

 base, much contracted above, the outer lip extremely 

 thin and not adhering to the body whorl ; pillar lip a 

 little thickened and white, columella visible to the end. 

 i...,040. Southampton, Poole, Guernsey, rare but 

 local. 



B. HYDATIS. Don. t. 8S.F. p. 292. B. AM- 

 PULLA. Pen. 4. p. 116. Subglobular, translucent, 

 with a brownish epidermis ; minutely striated spirally ; 

 apex concave but not exhibiting volutions ', aperture 

 interrupted by the rounded body whorl, widened below ; 



