FOSSILS FROM TUE ENVIRONS OF TOKYO. 5S 



UNGULID/E. 

 133. MYSIA PACIFICA Tok. 



Brauns, Ck'ol, Env. Tokio, p. 44. — Weinkaufk, Conclu ^Mittel-Meer.,. 

 I., p. 158.— W(X)]), Crajr Moll., II., p. 146. 



Brauns described this species as Diplodonta triyonula Hronn^ 

 which according to a iigure given by Wood is much thickened 

 in the interior of the sliell and more triaiiguhir at the angle 

 beneath the beak. Besides these two distinguishing characters I 

 can find no other marked difference between the two species. 

 The present species occurs very abundantly at ()ji, but has not 

 been found living in Japan. 



134. MYSTA AFF. SEMIASPERA Phil. 



I'l. III. Figs. 13 a, h and h'. 

 LiscHKE, Jap. Äleeres- Conch., II., p. 134. 



Shinagawa (rare). 



Specimens similar to the fossil species have been found 

 living at Nagasaki. JNIysia semiaspera Phil, is mentioned as 

 living at Nagasaki, in the West Indies, at Mazatlan, Acapulco, 

 Bachiade, San Bias in North Patagonia, ]vio Janeiro, Puerto, 

 Cabello and Tarns, and in the northern part of N. America (?) 



ERYCINID/E. 

 135. LAN.EA STRIATA Tok. 

 PI. III. Pigs. 14 a and h. 

 Brauns, G«o1. Env. Tôldo, p. 43. — AVood, Crag ]\Ioll., IL, p. 125. 



Shell small, orbicular, tumid, slightly e(iuilateral, nearly 

 circular ; surface with visible concentric lines ; umbones promi- 



