PTEROMYS GENIBARBIS. 
Oed. IV? e Rongeurs, Cuvier. W Division. 
Ord. IV. Glires, Linn. Syst. 
Ord. IV. Prensiculantia, Miger. Fam. 9> Agilia. 
PTEROMYS, Cm. Geoffr. Illig. 
Sciurus, Linn. Briss. Schreb. Pallas, §c. 
Petaurus, Fischer. 
Char. Gen. — Dentium formula ; Primores 4> Molares Primores superiores 
pagina antica la?vigati, inferiores compressi. Pro Laniarixs diastema. Molares 
abrupt! obducti tri tores, supra antico accessorio. 
Rostrum obtusiuseulum. Lahrum fissum. Sacculi buccales nuili. Auricula; rotundata;. 
Cauda elongata. Mamma aperta?, pectorales et ventrales. 
Pedes dermopteri : patagium lumbare saepius in angulum anteriorem dilatatum osse 
fultum, intordum patagium collare adest. Antipedes digitis quatuor et verruca 
hallucari, scelides pentadactyke. Illiger. 
Pteromys can us, subtus albus, dorso medio fulvescentc, Cauda oblonga obtusa 
plana disticha, vibrissis genarum numerosis radiatis adpressis. 
Kechubiiy of the Javanese. 
IN the systematic catalogues of Mammalia, two species of Pteromys have 
hitherto been enumerated, as natives of the Island of Java ; the most remarkable of 
these, the Sciurus Petaurista of Gmelin, is found in various collections, and its 
characters are accurately defined : the Sciurus Sagitta of Linnajus is still imperfectly 
known. The collections of the Honourable East India Company contain two new 
species, which have been added from the same Island ; one of these, the Pteromys 
gcnibarbis, has been selected for the present article. The history of the Sciurus 
Petaurista was first illustrated by the researches of Vosmaer and Pallas. The Sciurus 
