Argentine, Patagonlan, and Cape Horn Muridse. 185 



Hab. Near Villa Dolores, Cordova. Type from Yacauto, 

 900 111. ; other specimens from El Carrizal, 1000 m. 



Type. Adult male. B.M. no. 16. 1. 6. 24. Original 

 number 2537. Collected 17tli Nov., 1915, by Robin Kemp. 

 Presented by Oldfield Thomas. Eight specimens. 



The Cape Horn Evneomts. 

 Euneomys ultimus, sp. n. 



Allied to E. chinchilloides, but larger. 



General appearance about as in E. chinchilloides. Fur 

 long and. soft, hairs of back about 12-13 mm. in length. 

 Colour apparently of the same dull greyish fawn as in c/iin- 

 chilloides, but all the available specimens are or have been in 

 spirit, by which the colour may have been affected. Under 

 surface drab, the bases of the hairs slaty. Ears of medium 

 length, greyish brown. Hands and feet thick and clumsy, 

 with large palm and sole-pads which nearly touch one 

 another; edges of feet heavily fringed and the back of the 

 soles hairy except along the centre ; upper side of both hands 

 and feet white. Claws of normal size, not enlarged a& in 

 E. fossor. Tail short, thick and fleshy, closely haired, 

 markedly bicolor, brown above and white below. 



Skull and teeth quite like those of E. chinchilloides^ but 

 larger and heavier in all dimensions. On the other hand, 

 they are both smaller and. lighter than in E. mordax and 

 fossor. Upper incisors clearly and distinctly grooved. 



Dimensions of the type (measured on the spirit-speci- 

 men) : — 



Head and body 129 mm.; tail 90; hind foot 30; ear 19. 



Skull : upper molar series 6. 



Dimensions of adult skull in the Paris Museum : — 



Greatest length 33 mm. ; condylo-incisive length 30'5 ; 

 zygomatic breadth 20*3 ; nasals 14 x 4*6 ; interoibital 

 breadth 3'8; breadth of brain-case 14; zygomatic plate 3"2; 

 diastema 9 ; palatilar length 15 ; palatine foramina 8'5 ; 

 upper molar series 5'6 ; breadth of m} V7. 



Hab. Cape Horn Islands. Type from St. Martin's Cove, 

 Hermite Island. Other specimens from Orange Bay, Hardy 

 Peninsula, Hoste Island. 



Type. Adult male. B.M. no. 43. 11. 16. 26. Collected 

 in 1842 by Sir James Ross's Antarctic Expedition. 



This far southern species may be readily distinguished 

 from the Magellan E. chinchilloides by its greater size and 

 heavier teeth. 



