Fossils f'i-om tho Upper Musashino of Kazusa and Shimosa. ]^77 



reddish to light copper in the upper valve, and whitish to bluish 

 or even greenish in the lower. 



Fossil occurrence. — Otake, Kioroshi (frequent), Kamenari, 

 Tega, "Shito (very frequent). Oji, Tabata and Shinagawa in 

 Musashi. Lower Musashino of Miyata, Yokosuka and Naganuma. 



Living. — Northern, Central and Western Japan. 



287. Aièotnift lumtla, Yokoyama. 



PI. XIV. Fig-s. 22, 23. 



Shell thin, subcircular, with lower or right valve only a little 

 convex and upper or left more or less flat. Surface either quite 

 smooth or radiately and sinuously striated near the margin. 



The size of the shell is usually below 20 millim. in diameter, 

 though it is sometimes twice as large. 



Fossil occurrence. — Otake (not rare), Kioroshi, Shito. 



288. A.no»nia sentafatta, Yokoyama. 

 PI. XIV. Fig-s. 20. 21. 



Only a few left valves. Shell small, rather thin, roundly 

 elliptical, usually higher than long, swollen, ornamented with 

 many, close, sinuous, granulated, radiating riblets which increase 

 in number towards the shell-margin either by bifurcation or by 

 the intercalation of new ones between. 



The largest example measures 9.6 millim. in length, 10.7 

 millim. in height and 4. 1 millim. deep. 



Fossil occurrence. — Shito. 



Family Limidae. 



Genus 1AM.A., Bruguière. 



280. JLiina aiifjtilafa, Sowerby. 



Lima ainjiilata. Sowerby, Thes. Concli., I. p. 86, pi. XXIII, figs. 39, 40. Yokoyama, 



Foss. Miura Peniu., p. 148, pi. XII, fig. 12. 

 Lima basilanica. Atlams and Eeeve, Voy. Samarang, Zool., p. 75, XXI, fig. G. 

 Lima hakodatensis. Tokunaga, Foss. Env. Tokyo, p. Qi, pi. Ill, fig. 26. 



