3^ß2 -'^rt. 1. — M. Yokoyama : 



The lower valve is nearly elliptical in outline, with coarse 

 corrugated concentric lamiofe on the free portion of the shell. The 

 inner margin is finely crenulate up to near the beak at the anterior 

 side. Length 19 millim. Height 25 millim. 



The upper valve is suboval in form and ver^^ small, only 4.1 

 millim. in length and 2.7 millim. in height. The sculpture 

 consists of coarse concentric laminœ which in the lower two-thirds 

 of the surface give out tubiform ])rocesses or spines. 



Fossil occurrence. — Otake, Shito. Lower Musashino of Miyata. 



Living. — Central to Southern Japan. 



ï'amily CardiUdae. 



Genus VENERICARDIA, Lamarck. 

 359. Venericardia cipangoana, Yokoyama. 



PI. Xin. Fig. 4. 



Vemricardia cipangoana. Yokoyama, Foss. Minra Penin., p. 137, pi. XI, Fig. 2. 

 Venericardia comjn-essa. Yokoyama, Verst. a. d. jap. Kreide, Palaeontographica, 

 XXXVI, p. 196, pi. XXV, fig. 4. 



A full description of this species was given in m}^ work on the 

 fossils of the Lower Musashino above cited. 



The figured specimen is a large left valve from Otake, 34.2 

 millim. in length, 28.7 milhm. in height and 9.7 millim. m depth. 



Fossil occurrence. — Otake, Kioroshi. (common), Shisui, 

 Kamenari, Tega, Shito (very common). Lower Musashino of 

 Miyata and Naganuma. Miocene(?) of Foronai in the Hokkaido. 



Living. — Central and Western Japan. 



260. Venericardia ferruf/inea, (Adams). 



Venericardia ferruginea. Yokoyama, Foss. Miura Penin,, p. 139, pi. XI, figs. 3, 4. 

 Cardita ferruginea. Clessin, in Syst. Conch. Cab. :Mart. Cliemn., pt. 1, p. 17, pi. VI, 



fig. 11. Pilsbry, Cat., p. 135. 

 €ardita rotunda. Toknnaga, Foss. Env. Tokyo, p. 55, pi. Ill, fig. 17. 



Fossil occurrence. — Otake, Kamenari, Shito (very common). 

 Oji and Shinagawa. Lower Musashino of Miyata, Yokosuka, 

 Koshiba and Naganuma. 



Living. — Northern Japan- 



