PLATE 12. 



Fig. — Astacus kUniialhensis Stirapson. <f. Portland, Or. U. S. N. M. XI. Both of the phelipeds 



are .second growths, the left the older. 

 Fig. 2. — Aslacus klumathcnsisStiinpson. cf. Portland, Or. U. S. N. j\l. Shghtly 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. 



