SUBULINA. 71 



shaped, acuminate above, well rounded basally. Outer lip 

 strongly arched forward above, retracted to the suture. Colu- 

 mella slightly concave, its edge well reflexed, dilated above. 



Length 10.2, diam. 4.8, alt. aperture 5 mm. 



Length 10, diam. 4.5, alt. aperture 4.8 mm. 



Cagayan, Luzon. Types no. 58203 A. N. S. P. 



C. umbilicata has a much wider umbilicus. C. perforata is 

 about double the size, and has decussating spirals. In C. 

 philippinica very faint traces of spiral striation may be 

 traced in places on the last whorl. Both the wider (fig. 67) 

 and the more slender specimens are illustrated. 



45. C. UMBILICATA (Moellendorff). PI. 9, figs. 64, 65. 



Shell moderately umbilicate, conic-ovate, thin, glossy, hya- 

 line; spire high conic, with convex sides and rather acute 

 apex. Whorls 6, rather rapidly increasing, a little convex, 

 parted by a deeply impressed suture, striatulate, the striae 

 strongly sigmoid ; the last whorl about half the length of the 

 shell, flattened above, rather swollen and somewhat baggy 

 towards the base, subcompressed around the umbilicus. 

 Aperture oblique, the base receding, irregularly drop-shaped, 

 narrow above, base almost subangular ; peristome simple, un- 

 expanded, acute, the lip receding as it nears the suture, 

 curved forwards in the middle. Columella dilated, a little 

 protracted above, not thickened, the margins joined by a dis- 

 tinct parietal callus. Columella vertical, long and rather 

 straight. Length 14, diam. 7% mm.; aperture 8x4 mm. 

 (Mlldff.}. 



Cebu, on the western coast. 



Hapalus umbilicatus MLLDFF., Bericht. Senckenbergische 

 naturf. Ges., 1890, p. 245, pi. 8, f. 6. 



Conspicuously different from C. grateloupi by its open 

 umbilicus. 



Genus SUBULINA Beck, 1837. 



Shell imperforate, at all stages of growth, narrow, turrited, 

 or subulate, thin, corneous or brownish, usually more or less 

 translucent ; apex obtuse, rounded, the embryonic shell either 



