PLATE C. 



Pnge. 

 Fig. 1. Ak ALi A notata Lx . Yellowstone Eiver below Elk Creek 745 



2. Sapixdus GUAXDiroLioi.OiDES 11. sp. Hill above Lost Creek 738 



3. DiosrvROS HAGUEi 11. sp. Yellowstoue Kiver below Elk Creek 752 



840 



