34 BOOK OF SPECIES. 
lip (of the adult shell) thickened within; summit 
rather blunted. %. W. 35. 157. 
B. ocronus. Turreted, sub-cylindrical, whitish, 
diaphanous, with eight rounded whorls, and the 
summit obtuse ; aperture roundish; lip thin, and 
acute. 4. 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. 
7 OB: PT. 67. 
B. montanus. Ovate-oblong, perforated, 
striated, brownish horn-colour; whorls seven, 
convex; aperture semi-oval; lip with a white 
and reflected margin. 2...}. B. T. 62. 
B.HORDEACEUS. Small,ovate-oblong, smooth, 
brownish horn-colour ; aperture ovate; lip with a 
white reflected margin. 4. B. T. 63. 
B. pusricus. Small, ovate-oblong, smooth, 
brilliant fulvous horn-colour; aperture ovate; lip 
simple. B.1. T. 65. 
B. MELANOsTOMUS. Ovate-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. 13. W. Sup. 7. 23. 
B. BILINEATUS. Oblong-conic, thin, smooth, 
