916 ROBERT COLLETT, 



In the lower jaw the incisors are peculiarly broad and short, and 

 with their ends bent upwards (exactly, as in Ps. alhertisii). 



The lower canine is of normal construction, short and blunt, and 

 placed close to the incisors. 



There are no traces of (or place for) p i and p 2 ^ but p^ is close 

 to c and m 1 ; jp 3 is constructed almost in conformity with the upper 

 ^ 3 ; it is thus nearly as long as w 1 , but narrower , and has about 

 the same cusps, as in the upper jaw. 



The molars are normal, but narrower than the upper ones. 

 In his excellent article on the Phalangers and their System, in: 

 Encyclop. Brit., 9^^ ed. vol. XVIII (1885), Mr. Oldfield Thomas has 

 given the general characters of each of the 10 genera, which he re- 

 cognizes as belonging to this family, including the true Phalangers, 

 and the Flying-phalangers. 



By the discovery of this and the following new species of Pseudochirus 

 from N. Queensland, the characters of this genus, as indicated in the 

 above mentioned review, must, however, be modified in certain points. 

 The materials at my disposal naturally being insufficient to give a 

 complete Synopsis of its characters, I shall State only the points, 

 in which my investigations do not quite agree with those, given in 

 the Said review. 



„First Upper incisor but little longer than the others, but never- 

 theless the longest tooth in the jaw", is a character, which may pos- 

 sibly apply to Ps. caudivolvulus , whilst in the other specimens of 

 Pseudochiri , accessible to me , the first incisor is 2 — 3 times as long 

 as, and broader than the rest. 



The bullae osseae are in several species not larger and more in- 

 flated, than in Phal. vulpecula. They are largest in Ps. caudivolvulus, ^ 

 smallest in Ps. archeri and lemuroides. Moreover the palate is only 

 entire in Ps. archeri, almost entire in Ps. herhertensis, but presents 

 distinct foramina palatina in the other species. 



Finally it may be noticed, that (with my present materials) it 

 seems impossible to demonstrate any decided difference in the manuer 

 in which the intermaxillaria and maxillaria take part in the formation 

 of the foramina incisiva in the two genera Phalangista and Pseudo- 

 chirus', furthermore, the minute external opening into the inferior 

 dental canal is not constant in its appearence, but may be found in 

 some, and is wanting in other specimens of the same species. Of 

 exteiTial characters it may be mentioned , that only in a few the ear 



