ANODONTA. yal 
Var. II. Roissyi. Longer than the type, lower 
margin rounded outwards. 
Genus ITI. ANODONTA. 
The members of this genus are almost toothless, as 
the name implies. They are ovoviviparous. 
1. A. cranza ([eaten by] swans). 
Oblong, swollen, thin, brown or green, well marked by 
lines of growth; ligament long and parallel to the lower 
margin; inside pearly, iridescent. Length two and a half 
inches, breadth five. 
This is the largest of our freshwater mussels, attain- 
ing an average breadth of over five inches. It is found 
in great abundance in slow rivers, ponds, and canals as 
far north as Perth. 
Var. I. radiata. Larger, rayed with yellow. 
Var. II. incrassata. More swollen and solid. 
Var. III. Zellensis. Broader, yellow-brown. 
Var. IV. pallida. Light yellow, wedge-shaped. 
Var. V. rostrata. Ovate, upper margin forming a 
crest. a 
2, A. aNnaTina ([eaten by] ducks). 
Oval, compressed, green or brown, glossy; ligament short, 
prominent, straight, forming an angle with the lower 
margin. (See plate.) Scars deeper than those of the last 
species. Length two inches, breadth three and a half inches. 
