Fossils from the M iura Peninsula and its Immediate North. \A7 



Muscular impression distinct, white, more or less oval in form 

 with the uppermost largest and sometimes appearing somewhat 

 cordate in shape. 



The largest specimen is 45 millim. high, 51 millim. long, 14 

 millim. deep and has a suborbicular form (see figure). Another 

 one, which is ovate, measures 20 millim. in height and length 

 and 13 millim. in depth (see figure). 



This is a species which is still living in Japan, hut apparently 

 not yet named, It is very much like Anomia laqueata Reeve 

 (Conch, Icon., Anomia pi. IV fig. 18 ah) which also lives in 

 Japan. But in the latter, the beak is tumidly incurved, the ribs 

 more regular, less in number and more distant. 



Fossil occurrence, — Miyata Zone (Kami-Miyata, Shimo-Miya- 

 ta and Motowada); Yokosuka Zone (Yokosuka and Otsu); Naga- 

 numa Zone (Naganuma). Upper Musashin© of Shimosa. 



Living. — Northern, Central and Western Japan. 



Family Limidœ. 



Genus £jwa, Brtjguière. 



176. Lima goliath, Sowerby. 



Pl. XVI. Figs. 7, 8. 



Lima goliath. Sowerby, Proc. Zool. Soc. London, 1883. p. 30. pl. VII, fig. 3. 



This large species was found only in fragments. The shell is 

 somewhat obliquely ovate in outline and rather flattened. The 

 surface is ornamented with fine radiating and slightly undulating 

 grooves which in the front portion of the shell become deep, so 

 that the interspaces appear like ribs. In the middle of the shell 

 surface, the grooves are generally shallow and faint. 



Among the living shells from Sagami Bay there is a specimen 

 attaining the height of 160 millim., compared with which the fossil 

 forms are much smaller. 



Fossil occurrence. — Miyata Zone (Yamagayado-no-Motofudo- 

 shita in Kami-Miyata); Koshiba Zone (Koshiba). 



