Fossils from the Upper Musashino of Kazusa and Shimosa. lOS' 



148. Turbonilla [Chettuiitzin) h-idoensitt, Yokoyama. 

 PI. IV. Fig. 39. 



Shell rather small, elongate-conic. Nuclear whorls decollated. 

 Post-nuclear whorls many (ten ?), convex, longitudinally costellate. 

 Oostellee numerous, about twenty-eight on the body-whorl, obtuse, 

 slightly oblique and somew^iat flexuous, broader than interspaces, 

 ending at the rounded periphery of the body-whorl. Base convex, 

 smooth. Aperture subquadrate, the inner lip being bent at an 

 angle which is a little greater than a right angle. Height 11 

 millim.('.0 Diameter 2.5 miUim. A single specimen. 



Fossil occurrence. — Tega. 



Living. — Central Japan. 



140. Turbonilla {(Jhettrnit^iu) tegnttutnaiia, Yokc^yaina. 



PI. IV. Fig. 40. 



Shell rather small, elongate -conic. Nuclear whorls standing 

 on edge at the summit, post-nuclear whorls about eight, nearly 

 flat, somewhat shouldered at the upper margin, longitudinally 

 costellate. Costelke rounded, broader than interspaces, nearly 

 straight, slightly oblique with the upper end more forward than 

 the lower, about twenty on the penultimate, nearly obsolete on 

 the body-whorl. Periphery rounded. Base convex, smooth. 

 Aperture pear-shaped, the posterior angle being a little less than a 

 right angle, while the angle in the middle of the inner lip is much 

 greater. Height 6,5 millim. Diameter 2 milhm. 



Two specimens. In the smaller one (only 4.5 millim. high) 

 the number of post-nuclear whorls are seven and the costellœ are 

 also distinct on tlie body-whorl, but they vanish near the periphery. 



Fossil occurrence. — Tega. 



Living. — Central Japan. 



ISO. Turbonilla {(Jhentnifr^ia) senuitana, Yokoyama. 



PI. IV. Fig. 41. 



Shell small, elongate-conic. Nuclear whorls standing on edge 

 at the summit. Post-nuclear whorls six, a little convex, longitudi- 



