﻿ANODONTA 41I 



Kobelt, seems to me to be but a slightly abnormal A. japonica, 

 in which the beaks and anterior dorsal region are drawn for- 

 ward and upward. 



Anodonta lucida (Heude). 



Shell oval or elliptical, subcompressed, inequilateral, with 

 low, somewhat flattened beaks, whose sculpture is not known ; 

 posterior ridge well developed, subangular above, becoming 

 feebly double below and ending behind about on the median 

 line; dorsal line gradually curved down to the posterior point, 

 the dorsal wing scarcely developed ; upper anterior margin an- 

 gled ; surface concentrically sculptured ; epidermis shining, fus- 

 cous ; nacre silvery, shining. 



Length 75, height 40, diam. 20 mm. 



Siang and Lo Rivers, Hou-nan, China. 

 Anodon lucida Heude, C. F. Nank., III. 1877, pi. xx, fig. 43. 

 Anodonta lucida Simpson, Syn., 1900, p. 640. 



The compressed beaks and strong, concentric sculpture as 

 well as the decidedly rounded base, which is a little full behind 

 the middle, distinguish this from A. riviilaris. 



Anodonta rivularis (Heude). 



Shell subrhomboid, or subovate, somewhat elongated, in- 

 flated, inequilateral, with high, full beaks, which appear from 

 the figure to have concentric sculpture ; posterior ridge strong, 

 upcurved in the middle, ending behind in a point below the 

 median line ; posterior dorsal line regularly curved from the 

 beaks to the posterior end : base line slightly curved ; upper 

 anterior margin angled ; growth lines well marked and crossed 

 by faint, radial grooves, leaving the surface somewdiat reticu- 

 lated ; nacre whitish or fuscous, maculated. 



Length 70, height 50, diam. 40 mm. 



Lieou-ngan-tch' eou and Ning-kouo, China. 

 Anodon rivularis Heude, C. F. Nank., HL 1877. pi. xx, fig. 



44- 

 Anodonta ri:iilaris P.itTEi., C. Sam., TIT, 1890, p. 184. — Simp- 

 son, Syn., TOGO, p. 640. 



