500 



RODENTIA 



than 92 mm. (86 to 93 mm.). Brain-case relatively narrower 

 and deeper than in Lepiis timiclus, and parietal region less 

 flattened, the dorsal ijrohle 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 interorbital region. Posterior 

 extremity of malar and relative length of suture between malar 

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

 poi'tion of zygoma usually though not always diftering from that 



Fig. uriA. 

 Lepuf: euro/}Kiix. Nat. size. 



of L. timuhis in the greater width and relati^"ely 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 Ltytis tlmidns, its ventral profile a little less 

 convex and anterior border less rounded off, a pecularity not 

 easily described but which when once .seen is readily appreciated. 

 Terth. — In general the teeth resemble those of Oryctolagiis 

 cunindus, difTering in a few slight details only. Upper incisor 

 with groove on anterior face decidedly nearer internal border 



