638 PROCEEDINGS OF THE ACADEMY OF [Sept., 



slope of the sides straight, apex very obtuse. Whorls 7, quite convex, 

 separated by deeply impressed sutures. Aperture slightly oblique, 

 somewhat effuse below; outer lip sinuous, thin; columella straight, 

 vertical, the edge reflexed and appressed except for a minute umbilical 

 chink. 



Length 10, diam. 3.3, longest axis of aperture 3.3 mm. 



Length 7, diam. 2.8, longest axis of aperture 2.7 mm. 



Kyoto, Yamashiro. Types No. 78,757, A. N. S. P. 



The chief character of this species is its blunt, rounded apex. It is 

 very near 0. prestoni Sykes of Ceylon, but that species is a little less 

 striate and perceptibly more glabrous. 

 Opeas obesispira n. sp. 



Shell minutely perforate, turreted, translucent, whitish corneous, 

 the columella visible through the shell; glossy with faint, arcuate 

 wrinkles. Lateral outlines decidedly convex above. Whorls about 8J, 

 moderately convex, separated by impressed sutures, which appear to 

 have a translucent margin below. Aperture subvertical; outer lip 

 thin, arched forward in the middle, somewhat retracted below. Colu- 

 mella subvertical, with a distinct spiral twist below; its edge reflexed 

 above. 



Length 12, diam. 3.3, longest axis of aperture 3.3 mm. 



Riukiu. Types No. 79,093, A. N. S. P., from No. 4566 of Mr. Hirase's 

 collection. 



This species is smoother and less distinctly perforate than 0. gracile, 

 and the spire is thicker above, giving quite a different aspect to the 

 shell. The columellar reflection is narrower than in 0. prestoni Sykes. 

 All of the shells seen contain rather large white eggs. 



