MANUAL OF CONCHOLOGY. 



FAMILY HELICIDJS, Vol. VI. 



Genus COCHLOSTYLA Fer. (Continued.) 

 Section ORTHOSTYLUS Beck. 



This section formed the subject of the last pages of the preceding 

 volume of the MANUAL, the larger species having been illustrated 

 and described in that place. The forms to be discussed below lead 

 from the more topical manifestations of Orthostylus toward the 

 section named by v. Martens " Cochlostylse elongatse " or Hypselo- 

 styla. 



C. NUX Semper. Vol. VII, pi. 36, fig. 34. 



Im perforate, elongate-globose, the apex very obtuse ; solid, 

 obliquely distinctly striated and regularly malleated ; unicolored 

 rufous, covered with a brown cuticle. Whorls 5, convex, the last 

 much inflated, as long as the spire. Columella somewhat straight- 

 ened, white, excavated ; aperture somewhat ear-shaped ; peristome 

 narrowly reflexed, pale violet colored within. (Semp.~) 



Alt. 44, diam. 39 ; alt. of aperture 24, width 18 mill. 



Mountain- district of Northeastern Luzon. 



C. ( Orthostylus') mix SEMPER, Reis. Archip. Phil., Landmoll. 

 p. 204, t. 10, f. 2. 



The exact locality is not known. The species is said by Semper 

 to be quite near to C. juglans, but differs in contour and especially 

 in the malleations upon the last whorl. 



* Group of C. mus. 



Ovate or turbinate, dull colored species, covered with hydroph- 

 anous cuticle, which is nearly uniform or streaked in the direction 

 of growth lines only. 



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