Fossils from the Upper Musasliino of Km zu sa and Shiiiiosa. 95 



The largest example measures 25 millim. in height and 7 

 Toillim. in diameter. 



Fossil occurrence. — Otake (frequent), Shisui (do), Tega, 8hito 

 '(do). Oji in Musashi. 



Living. — Central and Western Japan. 



Genus Odostomia, Fleming. 



13S. Oflostotnia (Odosfomia) sitbthiipidft, Yokoyama. 



■Odostomia {Odotomia) siiblhnpida. Yokoyama, Foss. Mmra Penin., p. 8-2, pi. V, fig, 13. 



A single specimen. It is a little larger and broader than the 

 one described from the Lower Musasliino. Height 3.5 millim. 

 Diameter L8 millim. 



Fossil occurrence. — Otake. Oji in INIusashi. Lower Musashino 

 of Miyata. 



134. Odosfotnia {Odostotniii) tjordonis, Yokoyama. 

 PL IV. Pig. 27. 



Shell small, elongately ovate. Fost-nuclear whorls five or six, 

 slightly convex, somewhat shouldered near the upper suture with 

 a narrow sloping shelf above the shoulder which shows only a faint 

 suggestion of angulation, covered with almost microscopic spiral 

 striae. Incremental lines also very fine. Body-whorl large, 

 nearly as high as the spire or a little higher. Periphery rounded. 

 Base convex. Aperture ovate, pointed behind and rounded in 

 front. Inner lip witli a thin narrow coating of glaze- Columella- 

 fold strong, oblique. Height 5 millim. Diameter 2.5 millim. 



This shell is characterized b}^ its niore or less subtabulated 

 form. 



What Tokunaga described from Oji as Odostomia pla7ia Gould 

 (Foss. Env. Tokyo, p. 22) may possibly be this species, as it is 

 quite common at that place. But (mould's species whose habitat 

 is given as Hongkong seems to be quite different. 



Fossil occurrence. — Otake (frequent), Shisui, Kioroshi, Tega, 

 .Shito. Oji in Musashi. 



Living. — Central Japan. 



