﻿ANODONTA 415, 



Heude tells nothing of the color of his shell or its external 

 markings. His measurements are evidently wrong, for he says 

 "Long. T,T, mill., alt. 60 mill., crass. 65 mill." I do not think, 

 judging from the figure, that its diameter is greater than the 

 height. It is said hy its author to be very thin and delicate. 



Anodonta calipygos Kobelt. 



Shell typically rather short, subrhomboid, inflated with beaks, 

 which are full, rounded and rather high in the adult, but often 

 considerably flattened in the younger state, their sculpture con- 

 sisting of strong ribs, which nearly follow the growth lines ; 

 dorsal wing moderately high and angled ; the posterior end 

 decidedly and obliquely truncate above ; posterior ridge well 

 developed, ending behind at or below the middle of the height 

 in a narrow, feeble biangulation ; surface smooth, brownish 

 or blackish, lighter in the umbonal region, often having green- 

 ish, concentric bands and faint rays; nacre bluish-white, flesh- 

 color or purple-tinted. 



Length 98, height 64, diam. 43 mm. 



Length 75, height 50, diam. 42 mm. 



Japan. 

 Anodonta calipygos Kobelt, Abb. Senck. Nat. Ges., XL 1879,. 



p. 435, pi. XIX, fig. I — Simpson, Syn., 1900. p. 641. 



This form seems to almost, if not quite, connect with A. 

 lauta through the variety rostrata. This species is quite strong- 

 ly inflated, the greatest diameter being about the middle, and 

 from this point it is wedge-shaped toward the anterior and 

 posterior ends. A dorsal or ventral view shows an almost per- 

 fect diamond-shaped outline. It is a smoother, more shining 

 shell than lanfa and has ftfller beaks when adult, though in the 

 young state they are more compressed. 



Anodonta unduijFera Clessin. 



Shell irregularly obovate. much inflated, the inflation great- 

 est a little in front of the middle, from which point it is wedge- 

 .shaped in front and behind ; beaks a little in front of the cen- 

 ter, very high and full, their sculpture consisting of ridges. 

 which nearly follow the growth lines and spread a little be- 



