82 Merriam Four New Mammals from Mexico. 



Characters. Similar in size and general characters to P. tylorhinus but 

 color paler and more fulvous, grizzled on back with black-tipped hairs; 

 slaty plumbeous of underparts much paler and washed on tips with pale 

 fulvous. Skull slightly smaller; rostrum, nasals, and incisors decidedly 

 narrower; nasals narrow and strongly arched anteriorly; the posterior 

 half very narrow and of even breadth (sides parallel for posterior half) ; 

 jugal and pterygoids as in tylorhinus; molars smaller. Under jaw much 

 smaller. 



Cranial measurements. Skull of type specimen: basal length 53. 5; zygo- 

 matic breadth anteriorly 38; breadth of rostrum anteriorly 10; breadth 

 of nasals anteriorly 6; at middle 3. The flesh measurements have not 

 yet come in from the field. 



