COCHLOST YLA-CORASIA. 119 



(4) GROUP OF C. VIRGO. 



Globose-depressed shells, varying from acutely carinatecl to ob- 

 tusely subangular or rounded ; thin, very light colored ; surface 

 showing more or less obsolete spiral lines on the earlier whorls, not 

 distinct on the last ; not microscopically obliquely wrinkled or cor- 

 rugated. Whitish (or varying toward greenish or yellowish), uni- 

 colored or 1, 2 or 3-banded. 



Includes most of the species of the Philippine Islands. 



C. VIRGO Broderip. PL 24, figs. 29, 30. 



Imperforate, depressed, low-convex above, convex beneath, acutely 

 keeled at the circumference ; thin, entirely white (covered with a thin 

 yellowish cuticle when fresh), the lip narrowly edged with dark 

 brown. Surface shining, smooth, obliquely striatulate, showing 

 under a strong lens almost obsolete traces of spiral lines on the 

 earlier whorls. Whorls 4. Aperture oblique ; lip very narrowly 

 expanded, brow r n-edged ; columellar lip widened, flat, nearly straight, 

 white. Alt. 18, greater diam. 32, lesser 27 mill. 



Is. of Negros ; Western Zebu; Zamboanga, Mindanao. 



Carocolla virgo BROD., P. Z. S. 1841, p. 44. KEEVE, Conch. 

 Syst. ii, t. 168, f. 13. H. virgo PFR. in Conchyl. Cab., t. 68, f. 1, 2 ; 

 Monogr. i, p. 217. Rv., Conch. Icon., f. 89. DESK, in Fer., Hist, 

 t. 101, f. 13-15. H. (Corasia) virgo HIDALGO, Obras Malacal. i, 

 p. 147, t. 22, f. 1. Cochlostyla ( Corasia) virgo SEMPER, Phil. Archip. 

 Land Moll., iii, p. 166. v. MOLL., Landschn. Fauna Cebu, p. 229. 



This pure white shell with narrow r ly brown-bordered outer lip is 

 quite distinct from other earinated species. The surface is almost 

 free from spiral sculpture. The spire is sometimes much depressed. 



C. DEALBATA Broderip. PI. 21, fig. 36. 



Shell dull white, slightly yellowish, subdiaphanous, subglobose, 

 substriated with very close oblique growth-lines ; slightly subum- 

 bilicated ; aperture auriculate, large, lip-edge slightly substriated. 



Alt. 21, diam. 37* mill. (Brod.) 



Island of Siquijor, Philippines. 



H. (Carocolla) dealbata BROD., P. Z. S. 1841, p. 45 (not Helix 

 dealbata LOWE, 1830). H. Broderipi REEVE, Conch. Icon., f. 88, 

 (not H. broderipi Pfr.) 



