1905.] NATURAL SCIENCES OF PHILADELPHIA. 713 



the same form was sent from Nakanojima. It differs from Macro- 

 chlamys lineata by the smooth surface, without spiral striation. 



Macrochlamys lineatus n. sp. 



Shell narrowly umbilicate, depressed, convex above and below, thin, 

 amber colored, glossy; closely and rather deeply striate spirally above 

 and below. Whorls 4J, hardly convex, the last weakly and obtusely 

 subangular peripherally, convex below. Aperture but slightly con- 

 vex, lunate, the lip thin and fragile; columellar margin thin, triangu- 

 larly reflexed at the insertion. 



Alt. 2, diam. 3.2 mm. 



Nakanoshima, Ogasawara. Types No. 86,489 and 89,868, A. N. S. 

 Phila., from No. 1,177 of Mr. Hirase's collection. 



A very much smaller and more depressed shell than M. chaunax, 

 and differing from other Ogasawaran Zonitidce by its spiral sculpture. 



Otesia chiohijimana n. sp. 



Shell obliquely perforate, low-conic above, convex below, acutely 

 carinate at the periphery; thin, brown, not glossy, but with a dull 

 silken luster. Sculpture of irregular growth-wrinkles and a very fine, 

 close irregular granulation. Spire low-conic, with convex outlines 

 and an obtuse apex. Whorls 4f, but slightly convex, the last two 

 with a shallow furrow above the keel. Base convex, impressed at the 

 axis, paler in the middle. Aperture oblique, the lip thin, subangular 

 at the termination of the keel, basal margin narrowly dilated and 

 reflexed above. 



Alt. 3.2, diam. 5.5 mm. 



Chichijima, Ogasawara. Types No. 83,223, A. N. S. Phila., from 

 No. 865c of Mr. Hirase's collection. 



Otesia hahajimana n. sp. 



Shell obliquely perforate, conoid-convex above, convex beneath, 

 carinate at the periphery, thin, amber-brown, glossy. Sculpture of 

 strong irregular growth-wrinkles and striae, stronger and more con- 

 spicuous above, and comparatively coarse spiral striae. Spire low 

 conoid with convex outlines. Whorls 5, slightly convex, the last 

 a little impressed above the keel, the base convex, impressed at 'the 

 axis. Aperture oblique, the lips thin, basal margin deeply arcuate, 

 columella dilated and reflexed at the insertion. 



Alt. 4, diam. 5.3 mm. 



Hahajima, Ogasawara. Types No. 83,234, A. N. S. Phila., from No. 

 8656 of Mr. Hirase's collection. 



This species resembles 0. chichijimana in shape, but differs in the 



