28 WEST AMERICAN SHELLS 
tip, epidermis somewhat shining; nacre white. 
More inflated than nuttalliana.’’ 
Anodonta oregonénsis, Lea, the Oregon Anodon. 
‘‘Shell subalate, elliptical, somewhat inflated, in- 
equilateral; valves thin, beaks scarcely prominent, 
undulated at the tips; epidermis somewhat shin- 
ing and striate; nacre white.’’ 
Anodonta californénsis, Lea, the California 
Anodon. ‘‘Shell subalate, smooth, elliptical, some- 
what inflated, rounded behind; valves thin, beaks 
very small and undulated at the tips; epidermis 
olive-colored, shining; nacre white and iridescent. 
Smaller and more inflated than nuttalliana.’’ 
Anodonta kennérlyi, Lea, Kennerly’s Anodon. 
Lea’s deseription is as follows: ‘‘Shell smooth, 
elliptical, subeylindrical, somewhat ventricose, 
very inequilateral, somewhat truncate before, bi- 
angular behind; valves very thin, semitranspar- 
ent; beaks scarcely prominent, finely and closely 
undulate at the tips; epidermis yellowish olive, 
shining, striate at the margin without rays; nacre 
bluish-white and very iridescent. From near Puget 
Sound.”’ 
Anodonta dejécta, Lewis, the Low Anodon, is a 
species related to Gonidea angulata, though it 
lacks the sharp shoulder of that species. It is 
smooth and shining, shghtly winged, with a thin 
epidermis which gradually wears off in exposed 
places; somewhat rayed in the posterior regions. 
The interior is lurid, brownish or purplish, shad- 
ing to lighter at the edges. It grows to be over 
three inches in length. It is found in Arizona 
