PLATE 12. 
Fig.— Astacus klamathensis Stimpson. co. Portland, Or. U.S.N.M. X 1. Both of the chelipeds 
are second growths, the left the older. 
Fig. 2.— Astacus klamathensis Stimpson. co. Portland, Or. U.S.N.M. Slightly reduced. Showing 
both claws regenerated, of full size, and nearly symmetrical; yet very different in shape from 
the normal claw as seen in Plate‘11, Fig. 1. 
