Fossils from the Upper Musashino of Kazusa and Shimosa. gj 



70. Cotuiäibella {Afilia) furrieulata, Yokoyama. 



PI. II. Fig. 22. 



Shell turrete. Whorls about ten, the two apical ones smooth 

 and rounded, the following flath^ convex with the two uj^permost 

 longitudinally weakly plicate and the rest apparently smooth, 

 though by a good reflection of light fine spiral striae are visible. 

 Sutures with a raised margin below, so that the}- look somewhat 

 channelled. Body-whorl a little shorter than spire. Periphery 

 subangulate. Base suddenly narrowed into a rostrum which is 

 obliquely grooved. Aperture rhombic. Outer lip thin, smooth 

 within. Canal short, well defined, almost straight. A single exam- 

 ple which measures 14.5 millim. in height and 5 millim. in 

 diameter. 



The species is much like the j^receding, but somewhat larger, 

 though more slender, with the wliorls a little more convex and 

 the periphery not so sharply angulate. 



Fossil occurrence. — Otake. 



71. folnmhellii (.4f«7m) nffeetwsat', Yokoyama. 



PL II. Fig. 24. 



A few specimens. 



The shell is subfusiform with about eight whorls, of which the 

 apical ones are smooth, the one or two following longitudinally 

 weakly costate and Üie remaining smooth, only a little convex and 

 separated by deep subchannelled sutures. The body-whorl is 

 somewhat higher than the spire and abruptly narrowed below into 

 the base whose caudal portion is furnished with more than ten 

 oblique grooves. Periphery rounded. Aperture four-sided with 

 the posterior angle acute. Columella-lip bent in the middle, the 

 upper half obliquely sloping and the lower half vertical. Outer lip 

 varicose without, smooth within. Canal short, well defined, 

 curved a little sideward as well as backward. Height 12 millim. 

 Diameter 5 millim. 



This species is closely akin to Columbella (Atilia) niveomargiyiata 



