198 COCHLOSTYLA-ORTHOSTYLUS. 



tion), fig. 78, not fig. 81 ! DESH. in Fer. Hist. t. HOB, f. 1. (7. 

 turbo HIDALGO, Journ. de Conch. 1887, p. 139. 



Several specimens before me exhibit no variation. The published ^ 

 figures cited above are also very similar. 



C. BEMBICODES Pfeiffer. PL 31, figs. 36, 37. 



Imperforate, globose-turbinate, solid, striate ; white under a dull 

 buffish lusterless epidermis, with a chestnut band at the periphery. 

 Spire turbinate, apex obtuse. Whorls 5, convex, the last rounded, 

 little descending in front. Aperture very oblique, lunate-rounded, 

 white inside and shining. Columella subvertical, straightened, 

 dilated, flat, white ; peristome white, upper margin expanded, basal 

 narrowly reflexed, forming an obtuse angle with the columella. 



Alt. 35, diam. 44 mill. (P/r.) 



Romblon, Philippines. 



H. bembicodes PFR., Zeitschr. f. Mai. 1851, p. 15 ; Monogr. iii, p. 

 171 ; Conchyl. Cab. p. 408, t. 146, f. 6, 7. Cochlostyla bembicodes 

 HIDALGO, Journ. de Conch. 1887, p. 140. 



This species seems near to C. turbo in form and coloring. 



Section X. ORTHOSTYLUS Beck, 1837. 



Orthostylus BECK (in part), Index, p. 49. MARTENS in Alb. 

 Die Hel. p. 177. v. MLLDFF., Landschn. Cebu, p. 242. Pithohelix 

 SWAINS., Malacol. p. 166. Pythohelix SWAINS., /. c., p. 332. 



The shell is generally large, solid ovate-conic, covered with a 

 variously patterned hydrophanous cuticle. Aperture oblique, 

 ovate ; lip reflexed ; columella nearly vertical, more or less obviously 

 folded below. 



Anatomy typical of Cochlostyla. 



The present section is generally considered the typical group 

 of Cochlostyla. It is allied to the section Helicobulinus, which 

 consists of more inflated shells, and to the section Hypselostyla, con- 

 taining more elongated forms. The limits of Orthostylus are not 

 easy to determine, as there are species almost or entirely interme- 

 diate between this group and Helicostyla, as well as forms connect- 

 ing with Hypselostyla. 



