Vol. 5] 



Kellogg. — Rodent Fauna. 



435 



side of M,, and M 2 , than in D. parvus. The nature of the fold 

 may be due in part to age. 



Measurements. 



No. 12567 No. 12568 



P 4 , anteroposterior diameter 1.8mm. 1.7mm. 



Mi, anteroposterior diameter 0.9 



M : , anteroposterior diameter 0.8 



P 4 , transverse diameter 1.5 1.5 



M 1; transverse diameter ] .6 



M 2 , transverse diameter 1.6 



Incisor, transverse diameter 1.5 



Incisor, anteroposterior diameter 1.6 



Figs. 19a and 19&. — Palaeolagus nevadensis. Portion of right mandible 

 with P s , P 4 , M,, and M 2 . No. 12575, X 4. 



Fig. 19a, lateral view; fig. 19b, superior view. 



Fig. 20. — Lepus vetus. Portion of left mandible with incisor, P.„ P 4 , M„ 

 and Mo. No. 12565, natural size. 



PALAEOLAGUS NEVADENSIS, n. sp. 

 Figs. 19a, 196. 



Type no. 12575, Univ. Calif. Col. Vert. Pake., a portion of a 

 right ramus of the lower jaw with molar series complete except 

 for M 3 . Locality no. 1065 at Virgin Valley, Humboldt County. 

 Nevada. 



