500 RODENTIA 



than 92 mm. (8G to 93 mm.). Brain-case relatively narrower 

 and deeper than in Lepu.s tiiiiidiis, and parietal region less 

 flattened, the dorsal protile when viewed from behind arching 

 abruptly and conspicuously above level of zygomatic roots. 

 Anterior half of frontal nearly flat, the orbital rims rising slightly 

 but abruptly above general level of interorbita) region. Posterior 

 extremity of malar and relative length of suture between malar 

 and zygomatic process of squamosal as in L. timidus. Anterior 

 portion of zygoma usually though not always differing from that 



Fig. 102a. 

 Lepus europsevit. Nat. size. 



of L. timuliis in the greater width and relatively less depth of 

 the elevated region in front of lateral groove ; the least distance 

 from groove to anterior edge of zygoma usually equal to or greater 

 than depth at same region. Auditory bulla relatively a little 

 larger than in Lepus timidus, its ventral protile a little less 

 convex and anterior border less rounded off, a pecularity not 

 easily described but which when once seen is readily appreciated. 

 Teeth. — In general the teeth resemble those of Orydolagus 

 ciinieulus, diff'ej'ing in a few slight details only. Upper incisor 

 with groove on anteiior face decidedly nearer internal border 



