COCHLOSTYLA-ORTHOSTYLUS. 207 



Spire conoid, apex obtuse ; whorls 5i, the last scarcely descending, 

 more than half the total height of the shell. Aperture oblique, 

 large, blue-white inside ; peristome broadly and roundly reflexed, 

 dark chestnut-brown. Columella vertical, slightly arcuate, slightly 

 salient at its junction with the basal lip. 



Alt. 70, diam. 54 mill. 



Alt. 60, diam. 45 mill. 



Island of Polillo ; District of Infanta, Prov. Laguna, Luzon, 

 Philippines. 



B.portii PFE., P. Z. S. 1861, p. 193 (typog. err. for portei) ; B. 

 portei PFR. Novit. Conch., p. 308, t. 75, f. 1-3 ; Monogr. vi, p. 5. 



The ground-color is green, and the brown-lipped aperture is larger 

 than in C. woodiana Lea (reevei Brod.), a species similar in pattern 

 of cuticle. 



C. RUFOGASTER Lesson. PL 43, figs. 26, 27 ; pi. 45, fig. 47. 



Imperforate, ovate-conoid, solid. Ground-color chocolate or dark 

 chestnut, with a buff band at the periphery. Hydrophanous cuticle 

 dull brown, varied by a series of creamy, oblique dashes below the 

 suture, alternating with blotches of the dark ground-color of equal 

 size, and having a light creamy zone at the periphery, and another at 

 the columella. 



Spire high-conic, apex obtuse. Whorls 6-6J, the last very indis- 

 tinctly angled at the periphery in front. Aperture oblique, white 

 or lilac-white inside ; peristome rather narrowly, roundly reflexed, 

 chocolate colored ; columella subvertical, somewhat arcuate, flesh- 

 white or brown, forming a rather salient angle where it joins the 

 basal lip. 



Alt. 76, diam. 54 mill, (typical.) 



Alt. 54, diam. 43 mill. 



Alt. 45, diam. 35 mill. (v. minor.) 



Tuan, Prov. of Bulacan; Porac, prov. Pampanga; Los Banos, 

 Laguna ; S. Nicolas, N. Ecija, and Baler, on the E. coast, Luzon. 



H. rufogaster LESS., Illustr. de ZooL, t. 22, 1831. Bulimus 

 rufogaster PFR., Monogr. iii, p. 6 ; Conchyl. Cab., t. 50, f. 2. REEVE, 

 Conch. Icon., f. 4. DH. in Fer., Hist., t. 116, f. 3, Q. Cochlostyla 

 rufogaster SEMP., Reisen, p. 202. HIDALGO, Journ. de Conchyl. 

 1887, p. WQ.Bul. monozonus PFR., P. Z. S. 1848, p. 110 ; Monogr. 

 ii, p. 533 ; Conchyl. Cab., t. 46, f. 7, 8. REEVE, Conch. Icon., f. 

 195. 



