PTEROMYS GENIBARBIS. 



Ord. IV"?" Rongeurs, Cuvier. Vf Division. 



Ord. IV. Glires, Linn. Syst. 



Ord, IV. Prensiculantia, Illiger. Fam. 9, Agilia. 



PTEROMYS, Cuv. Geoffr. Illig. 

 SciURUS, LAnn. Briss. Schreh. Pallas, S^c. 

 Petaurus, Fischer. 



Char. Gen. — Dentium formula; Primores \, Molares -^. Primores superiores 



pagina antica l^vigati, inferiores compressi. Pro Laniariis diastema. Molares 



abrupti obducti tritores, supra antico accessorio. 

 Mostrum obtusiusculum. Labrum fissum. Sacculi huccales nuUi. Auriculce rotundatse. 

 Cauda elongata. Mammcz apertse, pectorales et ventrales. 

 Pedes dermopteri : patagium lumbare ssepius in angulum anteriorem dilatatum esse 



fultum, interdum patagium coUare adest. Antipedes digitis quatuor et verruca 



hallucari, scelides pentadactylge. Illiger. 



Pteromys canus, subtus albus, dorso medio fulvescente, Cauda oblonga obtusa 



plana disticha, vibrissis genarum numerosis radiatis adpressis. 

 Kechubu, 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 Linn^us 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 

 genibarbis, 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 



