COCHLOSTYLA-PROCHILUS. 49 



its reverse being of the same color. Semper described this from a 

 specimen denuded of cuticle. It is between the preceding and the 

 following in characters. 



Color variety pulchrior (pi. 16, figs. 12, 13). Ground color yel- 

 low, having two or three wide dark zones ; striped with hydropha- 

 nous cuticle. Earlier whorls dark purple; lip edged with black ? 

 its reverse black-brown. This is the most conspicuous and hand- 

 some form. 



C. DRYAS Broderip. PL 16, figs. 18, 19, 25. 



Almost covered but perforated, solid, pyramidal, the spire 

 conically elevated, its lateral outlines straight. Whorls 62 to 7, 

 nearly flat. Aperture decidedly less than half the length of the 

 shell, oblique ; peristome very broadly reflexed, strongly rolled back- 

 ward or recurved at the edge. Reverse of the lip light colored, the 

 dark bands, when present, not continuing upon it. Ground-color 

 white or whitish buff, unicolored or having dark bands below suture, 

 around umbilicus and often at the periphery. 



Spire straightly conical. Aperture small, the peristome very 

 broad, its face convex, white, never dark-edged. Columella very 

 heavily calloused above ; parietal callus rather thick at the edge. 



Alt. 52, diam. 25 mill. 



Alt. 48, diam. 21 mill. 



Mindoro, Philippines. 



Bulimus dryas BROD., P. Z. S., 1840, p. 94. Bulimus dryas PFR., 

 Monogr. ii, p. 41. REEVE, Conch. Icon., f. 45. Bulimus paradoxus 

 PFR. in Phil., Abbild. ii, p. 155, t. 6, f. 6. B. porraceus SOWB., 

 Conch. Illustr., f. 108-111, not of Jay. 



A solider, more straightly conical species than C. virgata, gener- 

 ally having a whorl more, a thicker columellar callus and a lighter 

 ground color, as well as a different color-pattern. Notwithstanding 

 all of these differences there are individuals which it is extremely 

 difficult to satisfactorily name. The principal color patterns are 

 the following: 



1. Unicolored white or faint buff (fig. 25). 



2. Unicolored white or faint buff, with a dark chestnut band at 

 or near the suture, and another at the columella (fig. 19). 



3. The same, but having a broad or narrow brown band at the 

 periphery (fig. 18). 



A specimen before me is chestnut-brown, with light apex, white 

 sutural line and darker subsutural and umbilical bands. 



