410 ^ii' O. Thomas o;> 



zygomatic hreadth 3 5-2; nasals 11-3; inteiorbital breadth 

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

 series 4"4. 



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

 from Canar, Ecuador. Alt. 2600 m. 



T^pe. Adult male. B.M. no. 99.9.9.68. Original 

 number 267. ColWted 18tii April, 1«99, by P. 0. Simons. 

 Presented by Oldtield Thomas. 



The numerous examples of this Phyllotis obtained by 

 Mi\ Simons in the mountains of Ecuador and Peru have 

 been hitiierto looked upon as referable to Ph. hagijardi, but 

 additional specimens of the latter, received since its first 

 description, show tliat it always has a comparatively sliort 

 tail (85-90 mm.), while that of Ph. midium 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. chinchiUoides 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 

 defined, the hairs broadly washed with cream-buflf. Ears of 

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

 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. 



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

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

 chiUoides. The supraorbital edges are, however, less sharply 

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

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

 and heavy, strongly grooved. 



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



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

 dried in) 78 ; hind loot 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 6T. 



Hab. Fort San Rafael, Province of Mendoza. 



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

 by Mr. T. Bridges. 



