EXPLANATION OF PLATE IIL 



Fig. 1. Ei'otomys rutllus (FaDiis). 



ad., S}'d Varanser, Fiumark, Norway, No. 6555, Merriam Coll. 



1, top of skull; la, palate region. 



2. Eootomys dawsoni Merriam. 



cf ad., Yakutat, Alaska, No. 735G6, U. S. Nat. Mas., Biological 

 Survey Coll. 



2, top of skull; 2a, palate region. 



3. Eootomys loruigi subsp. nov. 



(^ ad. (type), Portland, Traill Co., N. Dakota, No. 757!)5, U. 8. 

 Nat. Mus., Biological Survey Coll. 



3, top of skull. 



4. Evotnmi/s nirarius sp. nov. 



$ ad. (type), Mt. Ellinor, Olympic Mts., Washington, No. 

 66203, U. S. Nat. Mus., Biological Survey Coll. 



4, top of skull. 



5. Evotomys urangeli sp. nov. 



5. $ ad. (type), Wrangel Island, Alaska, No. 74724, U. 8. 

 Nat. Mus., Biological Survey Coll. {oa, same locality ; No. 

 74730.) 



5, top of skull ; •5«, palate region. 



6. Evotomys mazama Men-iam. 



6. (^ ad. (type). Crater Lake, Oi-egon, No. 79913, U. 8. Nat. Mu.s., 

 Biological Survey Coll. (6a (J^, same locality ; No. 79915.) 



6, top of skull ; 6«, palate region. 



(138) 



