BY N. DE MIKLOUHO-MACLAY. 143 



to the fron to-parietal suture and makes the bending of the pre- 

 maxillaiy region downwards very perceivable. (A line joining the 

 cutting edges of the molars and premolar extended forward would 

 pass over the base of the incisor.) The apex of the angular process 

 of the inferior margin of the Zygoma corresponds to the anterior 

 cusps of the second molar. 



The transversal ridges of the palate are 9 in number, and their 

 relative position is shown on fig. 6. 



There are two palatine foramina (of which one is very much 

 larger than the other) and several smaller on each side. 



Dentition. 



3 1 3 



— , i. — , pm. — , m. (the 4th molar just appealing in both jaws) 



113 



The shape and size (in proportion to the molars) of the upper 

 incisors present the most important character of the species. 

 Compared with the dentition of other species of the same genus, 

 Macropus Thetidis shows some resemblance to the incisors of 

 Macropus tibol (1). The fold of the second lateral incisor is very 

 much behind and is fully seen only when examined from below 

 (fig. 11). The premolars are not longer than the first molars. 



At the Australian Museum, I had the opportunity of examining 

 a stuffed specimen of a kangaroo from New Ireland, Macropus 

 Brownii Ramsay (2). 



The dentition of Macropus Brownii is somewhat similar (in the 

 relative size of the incisors) to that of Mac7'opus Tibol, however, 



(1) Waterhouse. Marsupiata, p. 144. 



(2) This kangaroo has been first described by Mr. E. P. Ramsay in a paper 

 read before the Linnean Society of New South Wales, in October 1876. 

 (Description of a New Species of Hahnaturus from New Ireland, by E. P. 

 Ramsay. Proceed. Linnean Society of N S.W., Vol. I., p. 307) as Halma- 

 turns Brovmii. Another collection made in the same place and at the same 

 time as the one which has been purchased by the Australian Museum, 

 having been sent to London, Mr. E. R. Alston, not knowing about the 

 description of Mr. Ramsay, desci'ibed agaiii the same kangaroo, as Macropus 

 higens (E. R. Alston, On the Rodents and Marsupials collected by Rev. G. 

 Brown in Duke of York Island, New Britain and New Ireland. Proceeding 

 Zoolog. Soc, 1877, p. 123, pi. XIX.) Although agreeing with the opinion 

 that the animal in question is a Macropus, I keep the species name (Brownii) 

 under which it was described ^rsi. 



10 



