Fossils froui the Upper Musashiuo of Kaznsa and Shimosa. 43 



penultimate whorl, coarse, blunt, somewhat curved above the angle, 

 straight and vertical below, separated b}^ much wider interspaces, 

 sometimes indistinct or obsolete on the body-whorl. Spiral striae 

 very fine, only visible with a lens by a good reflection of light. 

 Body-whorl longer than spire. Periphery rounded. Rase gradu- 

 ally tapering towards the front and usually with the whorl-ribs con- 

 tinuing into it. Aperture elongated, acute behind. Canal short, 

 straight. Inner lip with a reflexed callus on which there are seven 

 to nine unequal, distant, transverse striae or ridges which are most 

 distinct on the lower half of the lip. Outer lip varicose witliout, 

 transversely dentate within. Lip-sinus rather shallow, cut into the 

 concave surface above the angle and a little below tlie suture. 

 Height 12 millim. Diameter 3.5 millim. Rather rare. 

 Fossil occurrence. — Otake. 



S9. yianfjiliii (Cyfhara) of/uana, Yokoyaiiia. 

 PL I. Pig. 36. 



Shell small, subfusiform. Whorls eight, the first two smooth 

 and rounded ; of the remaining ones, the youngei' are sul)angulate, 

 while the older are convex. The sculpture consists of longitudinal 

 ribs and spiral striae. Ribs eleven on tlie penultimate whorl, strong, 

 somewhat oblique and curved, obtuse, a little narrower than inter- 

 spaces. Spiral striae three, the uppermost in the middle of the 

 whorls, the lowest close to the suture and indistinct on the whorls 

 preceding the penultimate. Besides these striae there are also 

 many very fine spiral lines on the upper half of the whorls, only 

 visible with a strong lens. Body-whorl a little longer than spire, 

 with periphery rounded and furnished with more than ten spiral 

 striae. The ribs on the base are nearly vertical. Aperture 

 elongated with a short straight canal. Inner lip with a callus on 

 which there are three teeth, the one whicli is blunt near the post- 

 erior end and the other two (the upper coarse and the lower not so 

 conspicuous) in the middle part. Outer lip thickened, varicose 

 without and with a few coarse teeth within. Lip-sinus moderately 



