Fossils from the Upper Mnsashino of Kaz\isa and Shimosa. QQ 



on the upper half of tlie whorls and the latter on their lower half. • 

 The striae are many, fine and close, while the sulci are generally 

 very narrow and line-like, nnndiei' three as a rule and are rather 

 distant. P)ody-wliorl ahout twice as long as spire. Periphery 

 rounded. Base gradually tapering toward its caudal end. The 

 plicae on the body-whorl become evanescent on the base, while tlie 

 spiral sulci are many, cover the whole surface and are broadest near 

 the middle of the base where they are wider than the interspaces. 

 Sutures sul)ehannelled. Aperture elongated, angular behind. 

 Inner lip with a tliin callus. Outer hp sliarp, receding both above 

 and below with the sinus shallow and wide, and distant from the 

 suture. Canal sliort, straight. Height 15 millim. Diameter 

 millim. 



A single specimen. 



TJiis shell looks very mucli like the preceding, but on a closer 

 examination, there are many minor distinctions, especially in the 

 sculpture. 



Fossil (jccurrence. — Otake. 



Genus DKILLIA, Gray. 

 »2. lit'Ulia itrhicipnlis, Pilsbry. 



Drillia pnndpaU^i. Pilsbry, Catalogue p. 17, pi. II, figs. 9, 10. 



Pleitrotoina {Drillia) piincipalis. Tokunaga, Foss. Env. Tokyo, p. 14, pi. I, tig. 13. 

 Yokoyama, Foss. Miura Penin., p. 36, pi. I. fig. 20. 



This species has already been described by Tokunaga and 

 myself in the works above quoted, the fuller description, 

 however, being found in Pilsluy's catalogue also above men- 

 tioned. It is not found at many places, but where found, it is 

 rather frequent. 



Fossil occurrence. — Otake and Tega. Also Oji and Shinagawa 

 in Musashi. Lower Musashino of Koshiba and Naganuma. 



Living. — Northern, Central and Western Japan. 



