410 Mr. 0. Thomas on 



zygomatic hreadth 15*2; nasals 11"3 ; inteiorbital breadth 

 4-3 ; palatilar length 13'2 ; palatal foramina 7; upper molar 

 series 4*4. 



Hah. Ecuador and Peru, along the Andean chain. Type 

 from Canar, Ecuador. Alt. 2600 m. 



Type. Mvi\t male. B.M. no. 99.9.9.68. Original 

 number 267. Collected 18th April, 1899, by P. 0. Simons. 

 Presented by Oldfield Thomas. 



The numerous examples of this Phyllotis obtained by 

 Mr. Simons in the mountains of Ecuador and Peru have 

 been hitherto looked upon as referable to Ph. haggardly but 

 additional specimens of the latter, received since its first 

 description, show that it always has a comparatively short 

 tail (85-90 mm.), while that oi Ph. andium is rarely less 

 than 115 mm. in length. 



Euneomys mordax, sp. n. 



A large heavily built greyish species, with normal-sized 

 claws. 



Size large, much larger than in the southern species 

 E. chinchilloides and petersoni, more as in E. fossor. Fur 

 long, thick, and woolly; hairs of back about 12-13 mm. in 

 length. General colour dull greyish, too much faded in the 

 type for exact description. Under surface lighter, not sharply 

 detined, the hairs broadly washed with cream-buff. Ears of 

 medium length, well-haired, the proectote blackish. Hands 

 and feet dull greyish white above ; fore claws of normal 

 length, not elongated as in E. fossor. Tail thickly haired, 

 greyish white with an indistinct darker line above. 



Skull stout and heavily built, very like that of E. fossor 

 and quite unlike that of the comparatively delicate E. chin- 

 chilloides. The supraorbital edges are, however, less sharply 

 angular than in E. fossor, the muzzle and palatal foramina 

 are shorter, and the teeth are smaller. Incisors very broad 

 and heavy, strongly grooved. 



Dimensions of tlie type (measured on the dry skin) : — 



Head and body (no doubt stretched) 147 ; tail (vertebrae 

 dried in) 78 ; hind foot 28. 



Skull (old, with worn teeth) : condylo-incisive length 31 ; 

 zygomatic breadth 20; interorbital breadth 4*7; breadth of 

 brain-case 16; palatilar length 15"7 ; diastema 9; palatal 

 foramina 7"6 ; upper molar series 6*1. 



Hab. Fort San Rafael, Province of Mendoza. 



Type. Old female. B.M. no. 55. 12. 24. 199. Collected 

 by Mr. T. Bridges. 



