124 COCHLOSTYLA-CORASIA. 



The above description, mainly taken from Pfeiffer, corresponds 

 well with the specimens before me, two of which are figured on my 

 plate. 



The surface is almost devoid of spiral striae ; the shell is entirely 

 white, fresh specimens having a very delicate greenish tint, scarcely 

 perceptible. It is smaller and less solid than C. cegrota, and the 

 peripheral angle is more obvious ; to C. eydouxi it is very closely 

 allied, but it lacks the constant sutural brown line characteristic of 

 that species. 



C. ^EGROTA Keeve. PI. 26, fig. 1. 



Imperforate, depressed-globose, smooth, white or of a very delicate 

 greenish tint; surface shining very delicately striatulate, showing 

 slight traces of subobsolete spiral lines on the earlier whorls. Spire 

 low, convex, apex plane ; whorls 4, the last very obtusely sub- 

 angular at the periphery ; aperture oblique, wide ; peristome white, 

 narrowly reflexed, the columellar margin dilated and adnate ; col- 

 umella nearly vertical, its inner edge straight, forming a slight angle 

 with the basal lip at their junction. 



Alt. 23i, greater diam. 37, lesser 29 mill. 



Mind or o ; Badajos, Tab las ; Tuburan, Zebu. 



H. cegrotus Kv., Conch. Icon., f. 95. H. cegrota PFR., Conchyl. 

 Cab., p. 437, t. 152, f. 3 ; Monogr. iii, p. 191. H. (Corasia) cegrota 

 HIDALGO, Obras Malacol. i, p. 152, t. 21, f. 8. Cochlostyla 

 (Corasia) cegrota v. MOLL., Landschn. Fauna Cebu, p. 230 (a 

 variety.) 



The yellowish-green tint of this shell is so delicate as to be scarcely 

 perceptible. The apex and lip are pure white. It is more solid and 

 stronger than C. eydouxi or C. virgo and its immediate allies. 

 The angulation of the periphery is scarcely sufficiently marked to be 

 noticeable. 

 C. SAMBOANGA Hombron & Jacquinot. PI. 26, fig. 13, 14, 15. 



Imperforate, subdepressed, thin, delicately striate, moderately 

 shining, waxen- white with two reddish-brown zones, one at periphery, 

 the other at the suture ; the suture opaque, white, irregularly sub- 

 crenulated. Whorls 4, convex, depressed above, the last moder- 

 ately inflated ; columella obliquely descending, flattened, acute, 

 white ; aperture rounded-rhombic ; peristome obtuse, straight, white. 



Alt. 20, greater diam. 30, lesser 24 mill. (v. Mart.) 



Islands of Zamboanga ; Zebu ; Magtan ; Mindanao ; Basilan ; 

 Lampinigan ; Candaraman ; Balabac ; Philippines. 



