EUPETAUBUS. 359 



Subfamily SCIURIN^E. 



Of this subfamily, which inhabits all the great zoological regions 

 except the Australian, the following four genera occur within 

 Indian limits. 



A. Limbs connected by a membrane or parachute. 



a. Hypsodont: inner borders of upper molars proxi- 



mally subangulate, their upper surface flat . . . , EUPETAURUS. 



b. Brachydont : inner borders of upper molars 



rounded, their upper surface irregular. 

 a'. An interfemoral membrane attached to the 



tail, which is bushy, not distichous PTEROMYS. 



b'. No interfemoral membrane ; tail distichous . . SCIUROPTERUS. 



B. Limbs free, not connected by membrane SCIURUS. 



All the Indian forms of these genera (except Eupetaurus, which 

 is a recent discovery) were described and a full synonymy given 

 by Dr. Anderson in his ' Anatomical and Zoological Eesearches.' 



Genus EUPETAURUS, O. Thomas (1888). 



Hypsodont, the molars having high crowns, with the grinding- 

 surface perfectly flat and not very complicated. Upper molars 

 peculiarly shaped, the crowns almost semi-oval, with a subangular 



Fig. 120. Crowns of right cheek-teeth of E. cinereus ; a, upper ; 

 b, lower. X 1. 



apex inside, placed at the proximal extremity of each tooth, so 

 that the greatest breadth of the tooth is oblique. Interfemoral 

 membrane rudimentary or wanting. Cartilage supporting the 

 lateral membrane short. In other characters this genus resembles 

 Pteromys. 



Only a single species is known. 



226. Eu.petau.rus cinereus. The woolly Flying-Squirrel. 

 Eupetaurus cinereus, Thomas, J.A.S. S. Ivii, pt. 2, p. 268, pis. xxii, 



Claws blunt. Single metatarsal pad small, oval, isolated. Ears 

 moderate, densely hairy outside, more thinly inside the conch. 

 Fur very long, thick and soft, underfur dense and woolly. Tail 

 cylindrical. 



