10 COCHLOSTYLA-ORTHOSTYLUS. 



Evidently a more ventricose species than C. pidor, ventricosa or 

 fulgetrum. 



My valued correspondent John Ponsonby, of London, suggests 

 that C. codonensis Hidalgo, figured on pi. 53, fig. 37 of the preced- 

 ing volume of the MANUAL, is closely allied or possibly identical 

 with this species. Having seen neither, I cannot decide the point. 



C. VENTRICOSA Chemnitz. PL 3, figs. 23, 24, 25, 26, 27, 28, 29, 31. 



Imperforate, ventricose, oblong-conoid, solid. Ground color a 

 tawny yellowish-brown, somewhat darker beneath, and frequently 

 having a dark band at periphery, with narrower bands at columella 

 and below the suture. Sometimes having no other pattern, but 

 typically covered with a creamy hydrophanous cuticle which is cut 

 into wide longitudinal bands by narrow, zigzag stripes of the ground 

 color. The dark stripes are usually bordered on one side by 

 opaque creamy stripes of equal width, the hydrophanus cuticle 

 being thinner over the rest of the surface. 



Spire elevated, conical, apex rather obtuse. Whorls 61. Aper- 

 ture elliptical, oblique, blue-white inside ; peristome expanded, 

 reflexed, white ; columella vertical, rounded. 



Alt. 50, diam. 32 ; aperture, oblique alt. 29 mill. 



Alt. 55, diam. 32 ; aperture, oblique alt. 31 mill. 



Alt. 58, diam. 30 ; aperture, oblique alt. 29 mill. 



Guimaras, Philippines. 



Bulla ventricosa CHEMNITZ, Conchyl. Cab. ix, pt. 2, p. 1, t. 117, 

 f. 1007, 1008 ; Das bauchichte Blasenschnecke CHEMN., t. e. p. 16, 

 1786. Bulimus ventricosus BRUG., Encycl. Meth. i, p. 365. PFR., 

 Symb. iii, p. 88 ; Conchyl. Cab. t, 58, f. 1-4 ; Monogr. ii, p. 30. 

 PHIL., Abbild. iii, Bui t. 7, figs. 1, 5, 6, $.Bulfrater FEB., Hist, 

 t. 112, f. 1, 2. REEVE, Conch. Icon. t. 6, f. 25. . nobilis RVE., 

 Conch. Icon. t. 5, f. 20. B. guimarasensis RVE., Conch. Icon. t. 6, 

 f. 24 ; DH. in Fer. Hist, iv, t. 157, f. 9-12. . decoratus FER., I. c. 

 t. 112, f. 3, 4. 



This is a most variable species, approaching C. fulgetrum in color 

 and form, but distinguished from it by having a darker ground 

 color and in having the hydrophanous stripes much wider, when pres- 

 ent. It differs from C.pietor in having the lip invariably white ; from 

 all forms of C. satyrus in being more ventricose and in lacking a 

 subsutural border. 



The color varieties may be classified as follows : 



