122 COCHLOSTYLA-CORASIA. 



C. CERUGINOSA Pfeiffer. PI. 26, fig. 6. 



Imperforate, globose-depressed, rather thin, striatulate, shining, 

 greenish- white ; spire convex, vertex small, obtuse ; whorls 4, a little 

 convex, the last not descending, inflated ; periphery obsoletely 

 angulated, at the suture banded with rust color ; columella sloping, 

 slightly arcuate, subexcavated, white ; aperture oblique, wide-lunar ; 

 peristome slightly reflexed, margins subconniving, right margin 

 sinuous, basal margin arcuately passing into the columella. 



Alt. 18, greater diam. 31, lesser 26 mill. (Pfr.) 



Is. of Bohol and Panglao, Philippines. 



H. ceruginosa PFR., P. Z. S. 1854, p. 56 ; Monogr. iv, p. 215. 

 REEVE, Conch. Icon., f. 1265. Cochlostyla (Corasia) ceruginosa 

 SEMP., Reis., p. 169. H. (Corasia) ceruginosa HIDALGO, Obras, p. 

 152, t. 21, f. 3. 



Closely allied to C. eydouxi, cegrota, etc. 



C. FILARIS Valenciennes. PI. 25, figs. 52, 53, 54 ; PI. 26, figs. 10, 



11, 12. 



Imperforate, depressed-globose, convex above and below, obtusely 

 angulated at the periphery ; white (covered with a thin deciduous 

 yellowish cuticle) the lip broadly edged with purplish-brown, the 

 suture narrowly white-margined ; surface shining, obliquely striated 

 earlier whorls seen to be obsoletely, spirally striated under a lens. 

 Whorls 4-4J. Aperture oblique, wide ; peristome narrowly ex- 

 panded, the columella subvertical, flattened, somewhat excavated, 

 its inner edge straight or a little irregular, brown below, becoming 

 white above. Alt. 20, greater diam. 33, lesser 27 mill. 



Marinduque ; Zamboanga, Mindanao. 



H.filaris (VAL. in Paris Mus., teste Cuming) PFR. P. Z. S. 1845, 

 p. 38 ; Monogr. i, p. 262. HIDALGO, Obras Malacol. i, p. 152, t. 23, 

 f. 1-4. H. nympha PFR. P. Z. S. 1849, p. 129 ; Monogr. iii, p. 147. 

 REEVE, Conch. Icon., f. 85. f C. broderipi var. fasciata v. MOLL., 

 Landschn. Fauna Cebu, p. 230. 



The periphery is far less acutely angled than in C. virgo, and the 

 dark border of the lip is broader. Fig. 52 of pi. 25 represents the 

 typical form. Hidalgo arranges the varietal forms as follows : 



Var. 1. (PI. 24, fig. 31). Periphery of the last whorl rounded. 

 This is the H. nympha of PfeifFer and Reeve. 



Var. 2. (PI. 26, figs. 10, 11, 12). Apical whorls purplish-black ; 

 suture usually narrowly margined with brown. 



