﻿406 ANODONTA 



were made by Pcre licude. Tlie species is evidently an abund- 

 ant and widespread one in China and consecpiently variable, 

 but I have not included in it a j^reater diversity of forms than 

 I ha\e ])Iaced under .hiodonta cxi^nca or A. ^^randis. The 

 National Museun> possesses a j:i^ood series of this material, all 

 of Lea's, a very good set from the Morelet collection, which 

 came from and was labeled by Heude, and a considerable 

 number of speciiuens obtained from various other sources. 

 Anodonta zvoodiana is considerably more elongated and is 

 darker and less rayed than ./. fnagnifica, but the above men- 

 tioned series shows everv connecting link between them. It 

 is possible that when more complete series of shells from this 

 region are gathered together and we have a better knowledge 

 of the geographical distribution of these variations some of 

 them may take rank as geographical races or varieties, but 

 with such knowledge as I have I am not c[ualifie(l to mark out 

 such varieties. Kobelt claims that A. zvoodiana occurs in Ja- 

 pan, but his shell is. I think, a form of A. laiita and not Lea's 

 species. A. woodiana is characterized by its full beaks with 

 sculpture that spreads posteriorly, its feebly biangulate pos- 

 terior point on the median line and generally the subangular 

 post-median basal swelling. The nacre is usually rather bright 

 for an .hwdouta. 



Anodont.v RicHTiioncxi Xeumayr. 



"Shell large, thin, inequilateral, egg-sha])ed. very much in- 

 flated, regularly rounded in front, wider behind, dorsal margin 

 almost straight, slightly curved anteriorly, winged behind ; 

 basal margin rounded ; posterior margin straight, oblique, pos- 

 terior end somewhat pointed. Ileaks flat, wrinkled ; the great- 

 est diameter is nearly under the l)eaks, so that the shell is very 

 greatly inflated, from there is a gradual slope to the ends and 

 basal margin. Ei)iflermis olive-green, radiate, posteriorly and 

 toward the beaks darker. Xacre yellowish. 



lyenglh T23, height 78. diam. 55 nun." ( Xeumayr.) 

 Type locality, region of Tsching-kiang, Province of Kiang- 

 su. China. 



