﻿408 ANODONTA 



thickening suddenly terminating at the subangular ccnle; n't 

 the base. 



Length lOo, lieight ()S. diam. 40 mm. 



Lake of Yun-nan-fou. China. 

 Anodon fnioiiilii lli:ri)i:, C. F. Xank.. I\ . 1878, pi xxxi, fig. 



64. 

 Anodouta fciuuiiHi Simi'Sox, Svn.. i()CXD. p. Ci^c). 



This shell is sometimes almost rhomboid in outline and is 

 remarkable for the great and sudden thickening of the front 

 half of the nacre. It seems to bear about the same relation to 

 A. 7voodiaua that . /. impUcata does to . /. cataracta. 



AxoDOXTA j(»iKi)\i Morlet. 



Shell large, irregularly obovate. inflated below the beaks, 

 from which ])oint to the posterior end it is wedge-shaped, in- 

 equilateral, subsolid. strongly concentrically striate ; post-dorsal 

 wing well developed, truncate with an incurved outline behind ; 

 the wide, biangular posterior point of the shell is on the me- 

 dian line ; l)ase and anterior end rounded, the latter cut away 

 below, and slightly angled above ; beaks full, raised a little 

 above the dorsal line with longitudinal, undulated ridges; epi- 

 dermis pale green and rayed in the young shells, brownish- 

 green when old ; nacre bright salmon, shining. 



Length 157. height 108. diam. 54 mm. 



Tonkin. 

 Anodonfa jo\irdy\ ATori^kt. ]. de Conch.. XXXIV\ 1886, pp. 



76, 288. pi. XV, figs. T, \a. — Simpson, Syn., tqoo, p. 639. 



Evidently closely related to ./. woodi'aua. Tt seems to be 

 less inflated than that species, to be more decidedlv wedge- 

 shaped behind and more cut away at the anterior base. 



Anodoxta T.Ai'T a vou Martens. 



Shell irregularly elliptical obovate. sometimes ovate, thin to 

 rather strong, subinflated. inequilateral ; with beaks varying 

 from compressed to full, their sculpture consisting of a num- 

 ber of curved bars, which nearlv follow the growth lines and 



