OPEAS, PHILIPPINE IS. 179 



rather obtuse ; suture impressed. Whorls T 1 ^, convex, the last 

 one-third the total length. Columella narrow, vertical, a 

 little reflexed above. Aperture vertical, ovate-subtruncate, 

 basally rounded; peristome simple, unexpanded. Length 

 10.5, diam. 3.5 mm. (Hid.). 



Mainit, Mindanao. 



Stenogyra semperi HID., Journ. de Conchyl. 1888, p. 36, 

 pi. 6, f. 3. 



A specimen before me seems to be a short, stout Opeas, 

 not unlike some forms of Japan and China. The outer lip 

 is strongly arched forward. The vertical columella shows, in 

 some specimens, a barely noticeable oblique truncation be- 

 low. The species seems closely related to 0. ternatanum 

 Bttg., a larger and more distinctly truncate species. It is 

 more obese than 0. mauritianum. 



82. 0. PILOSUM (Semper). 



Shell conic-turrited, covered perforate, densely and very 

 minutely striate, encircled with hair-bearing spiral lines, the 

 hairs very minute; apex rather acute. Whorls 6, slowly in- 

 creasing, slightly convex, the last tapering below. Aperture 

 subvertical, long-ovate; columellar margin straight, rather 

 broadly reflexed at the insertion, over the very narrow um- 

 bilicus. Length 10, diam. 4, aperture 4x2 mm. (Semper). 



Luzon: Mt. Mariveles near Manila, at 2-3000 ft. 



Stenogyra pilosa SEMPER, Reisen im Archip. Phil., Land- 

 Moll., p. 138. 



Distinguished by the hairs on the fine and close spiral lines, 

 which are so small as to be visible under the lens only in a 

 good light. 



83. 0. MONTANUM (Semper). 



Shell ovate-oblong, the apex rather obtuse, covered perfor- 

 ate, smooth, glossy, very pale-corneous. Whorls 6, convex, 

 the last about two-fifths the total length, base rounded. 

 Aperture ovate-tetragonal, the columellar margin straight, 

 broadly reflexed, nearly closing the narrow umbilicus. 

 Length 5.5, diam. 2.33, aperture 2x1 mm. (Semp.). 



