IQQ . Art. 1. — M. Yokoyama : 



143. Odostattiia {J^^gilina) nutrielloides, Yokoyania. 

 PL IV. Fig-. 34. 



Shell small, ovate-conic. Post-iiaclear whorls five, nearly 

 flat, somewhat shouldered at the summit, so that the shell appears 

 more or less tabulated, longitudinally costulate. Costulse numerous, 

 broadly rounded, close, broader than interspaces, somewhat 

 oblique and flexuous, the lower end being more posterior than the 

 upper. Body- whorl somewhat higher than spire. Periphery 

 subangulate, bounded below by a puncticulate spiral groove which 

 is on the same level as the suture of the last part of the body-whorl. 

 Below this groove there are still a few more grooves of the same 

 nature. Base abrupt^ narrowed. Aperture ovate, posteriorly 

 pointed, anteriorly produced and rounded, Avith the margin some- 

 what reflexed outward. Outer lip thin, sharp. Columella-tooth 

 weak, but distinct. Height 4 millim. Diameter 1.8 millim. 



This shell resembles Odostomia marlella Dall and Bartsch (Notes 

 on Pyram., p. 354, pi. XXII^ fig. 4) in which, however, the apex 

 is truncate and the costuke oblique in the opposite sense, that is 

 to say, with the lower end more anterior than the upper. 



Fossil occurrence. — Otake (rare), Tega (do). Oji in Musashi. 



Genus TUKBOXII.I..4, Eisso. 



144. Tiirbonilla {PtycIteulièneUa) ittisella, Yokoyama. 



PI. IV. Fig-. 36. 



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

 at the summit. Post-nuclear whorls about-^ seven only slightty 

 convex, longitudinally plicate. Plicœ about sixteen on the whorl 

 preceding the penultimate, flattened, with narrower interspaces, 

 very weak and faint on the penultimate and obsolete on the body- 

 whorl, so that the latter appears quite smooth. Periphery rounded. 

 Aperture ovate, acute behind. Outer lip thin. Height 3.6 millini. 

 Diameter 1.2 millim. A single specimen. 



Fossil occurrence' — Otake, Tega. 



