Ft. 



Inches. 







4 







4 







2 



1 



13 







4 







'i 1 



°5 







05 

 ^4 







4| 



is.) 









1*2 







l 5 



402 Orc a new Species of Pteromys. 



Length of humerus, 



Of radius and ulna, 



Of paw, (excluding the claws), 



Breadth of parachute, from one calx to the 

 other,... 



Length of femur, 



Of tibia,... 



Of hind foot, (excluding claw,) 



From insertion of tail to edge of parachute, . . . 



(That is, the parachute borders tail for 4| inches.) 



Across the head, from ear to ear, ... 



Length of ear, ... 

 Fur. — The fur is of one kind, thick and soft, filmy near 

 roots, ending (for the most part) in a thicker opaque fila- 

 ment. The parachute is more thinly clad, but fringed 

 with a thick border of fur. Tail round and villose. Face 

 and anterior part of limbs clothed with smooth short hair. 

 Teeth. — Formula, 2 4 ' 4 : 



The teeth are brownish orange coloured. Incisors pro- 

 ceeding far into sockets, as in Hystrix. Upper molars very 

 broad — transverse, inner half smooth, outer half tubercu- 

 lous. Lower molars square, flat, smoothly tuberculous. 



Physiognomy. — Nose bare, thick, tumescent, nostrils 

 small, round, separated by a thick septum ; upper lip and 

 brows clothed with long vibrissae ; some black, some grey. 

 Eyes large, full, suited to darkness. Upper lip cleft almost 

 to nose. Head broad, flat. Ears rounded, without tuft 

 or fringe ; no cheek pouches. 



Feet. — As in Sciurus generally, but no vestige of the 

 tubercle supplying the place of a thumb, although the Oral 

 feeds by the help of its fore-paws in the same way as other 

 squirrels. Claws semicircular, sharp, and compressed. Feet 

 clothed with short hair. The soles of the fore-feet bare : 

 of the hind feet half bare and half hairy, the hair clothing 



