332 PROF. E. COLLETT Oy MAMMALS [Mar. 16, 



P^ aud ^' always absent ; p* present, long, tricuspid, rather 

 broad behind. 



Molars as in npper jaw. 



TouNG, IN Spirit. 



Size of a half-grown rat. Length from snout to vent about 

 100 mm., tail 81 mm. 



Body still almost naked ; the vibrissse only are well developed, 

 forming 7 rows. A tuft of long hairs on the wart-like protu- 

 berance on the inner surface of the forearm. 



Lower incisors half developed. 



Pads on hands and feet very large, with exceedingly fine trans- 

 verse striations. Number of palmar pads 5 : one very lai-ge postero- 

 external, one large poUical, three anterior (as usual only one below 

 3rd and 4tb finger). 



Sole-pads 6, one very large postero-external, two poUicals, three 

 anterior (one only below the connected 2nd and 3rd toe). 



The small pads below the tip of each finger and toe are com- 

 paratively lai'ge and distinct. 



Claws proportionally very short. 



Locality. 



Hah. The Eock Phalauger inhabits the granite formations of the 

 western heads of the Eiver Mary, Arnhem Land, and is tolerably 

 numerous there on the great central tableland. 



During the daytime it hides amongst the colossal boulders, and 

 leaves the rocks only at night, when it ascends the trees in search 

 of food. This consists principally of the soft parts of a kind of 

 berry with large stone, like a giant cherry (belonging to the genus 

 Zizyphus ?). 



It never sleeps in hollow trees, like its congeners, but it will, 

 when roused, occasionally take refuge in a tree. 



Native name : Wogoit. 



24. Petaubds beeticeps, Waterb., 1838. 



Petaurus Ireviceps, var. tyjncus, Thos. Cat. Mars. Monotr. Brit. 

 Mus. p. 156 (188^) ; Ogilby, Cat. Austral. Mamm. p. 34 (1892). 



N. Australia : Mt. Showbridge, March 16th, 1895 (one speci- 

 men). Mary River, May 1895 (one skull). 



Skin. Length of female from snout to vent (measured from the 

 skin (about 170 mm., tail (to tip of hairs) 230 mm. 



Dorsal stripe strongly marked ; tip of tail (in the single speci- 

 men) white. 



Young. Two young ones (size of a mouse) in spirit. Length 

 from snout to vent 65 mm., tail 85 mm. Tip of tail white. 



One young (a little larger). Length from snout to vent 85 mm., 

 tail 110 mm. Tip of tail black. Dorsal stripe well marked in 

 all ; tail still short-haired. 



