34 BOOK OF SPECIES. 



lip (of the adult shell) thickened within ; summit 

 rather blunted, f . W. 35. 157- 



B. OCTONUS. Turreted^ sub-cylindrical, whitish^ 

 diaphanous, with eight rounded whorls, and the 

 summit obtuse ; aperture roundish ; lip thin, and 

 acute, f. W. 35. 150. 



B. ACUTUS. Turreted, oblong, slightly wrinkled, 

 generally whitish, with brown streaks or bands ; 

 whorls from nine to twelve ; apex and lip acute. 

 |. B. T. 67. 



B. MONTANUS. Ovate -oblong, perforated, 

 striated, brownish horn -colour; whorls seven, 

 convex ; aperture semi-oval ; lip with a white 

 and reflected margin. | . . . ^. B. T. 62. 



B. HORDEACEUs. Small, ovatc-obloug, smooth, 

 brownish horn-colour ; aperture ovate ; lip with a 

 white reflected margin. ^. B. T. 63. 



B. LUBRicus. Small, ovate-oblong, smooth, 

 brilliant fulvous horn-colour; aperture ovate; lip 

 simple. B. i. T. 65. 



B. MELANOSTOMUS. Ovatc-oblong, ventri- 

 cose, crowdedly granulated, marbled with whitish 

 orange, brown or cinereous ; base perforated ; um- 

 bilicus obtuse, black ; whorls rather convex, the 

 first longitudinally plaited above ; aperture ovate, 

 black ; lip thickened within, and without reflected ; 

 emarginated at the base. If. W. Sup. 7. 23. 



B. BiLiNEATUS. Obloug-couic, thin, smooth. 



