PLATE 10. 



Fig. 1. — Astacus gambelii cotinedens Faxon, c?. TjTJe. Snake R., Upper Salmon Falls, Idaho, Oct. 



3,1894. U. S.N. M., No. 23,096. Enlarged. 

 Fig. 2. — Astamts gambelii with most of the characters of .4. y. coriricctens. cf . Mouth of St. Joe R., 



Cocur d'^ilene Lake, Idaho. IT. S. N. M. X 1. 



