Fossils from the Ujiper Musaehino of Kaznsa and Shimosa. 65 



Genus OCINEBKA, Leach. 



77. Ocinebt'a fatvata, (Sowerby). 

 PI. III. Ficr. 4. 



Ocinehra faJcata. Pilsbry, Cat., p. 42. Tryoii, Man. Conch., IT, p. 127, pi. 38, fig. 457. 



Murex falcntus. Sowerby, Tlies. Conch., IV, p. 44, pi. 394, fig. 149. Dnnker, Intl. 

 Moll., p. 6. Lischke, Jap. Meeresconch., II, p. 30. Tokunaga, Foss. Env. Tokyo, 

 p. 4, pi. I, fig. 1. Schrenck, Moll. Aiuurl. n. <1. nonl-jap. Meeres, p. 410. 



This characteristic shell alread}^ described b}^ Tokunaga from 

 Shinagawa is more or less variable in shape. The number of varices 

 is usually five to seven, but rai-ely four. The spines born on the 

 shoulders of the varices are sometimes long and acute, sometimes 

 short and blunt. 



Fossil occurrence. — Shito (frequent). Tega. Shinagawa in 

 Musashi. 



Living. — Northern, Central and Western Japan. 



78. Oeinebrtt stteeffifn, Yokoyauia. 



PI. III. Fig-. 5. 



Shell pyriform. Spire short. Body-whorl very lai'ge. occupy- 

 ing about iour-tifths the total height of the shell. Whorls about 

 seven, shouldered. Shoulders angulate, the surface above the shoul- 

 ders being flat and nearly horizontal, below flat and vertical. The 

 sculpture consists of longitudinal varices and spiral threads. Varices 

 twelve on the penultimate whorl, thirteen on the preceding one 

 and only eight on the last, straight, rib-Hke, I'ounded, somewhat 

 narrower than interspaces, spiny at shoulders. Spiral threads very 

 flat, weak, distinct only below the shoulders where they number 

 three on the penultimate whorl and the preceding one with an in- 

 terstitial thread in the former. (3f these three threads, the upper- 

 most is just on the shoulder and the lowest near the lower suture, 

 while the middle one is just midway between the two. The spines 

 of the body-whorl are first directed upward and then somewhat in- 

 ward, hollow and canal-like, the opening being at the anterior side. 



