28 MACBOPODID^. 



canal entirely in lacrymal bone. Palatal foramina very long, ex- 

 tending some way into the maxilla. Anterior palate short and 

 narrow, its edges weU defined. Posterior palate very incomplete, 

 there being two large vacuities, each as large as m.^, opposite the 

 infrazygomatio processes, and the palatine portion forming a net- 

 work of minute vacuities. 



Teeth (PL VI. figs. 1 & 2, and Owen, I. c). Incisors very like 

 those of M. rufus, longer vertically and slenderer than those of 

 M. giganteus. Roots of the first pair of incisors close together, so 

 that their tips meet at a very acute angle. ■ Enamel-covered portion 

 of i." much higher than long. P. small, and, as weU as i.' and i.", 

 entirely ungrooved externally. P.'' very similar to, but slightly 

 smaller than, that of M. giganteus. Molars remarkable for their 

 high and sharply developed cusps, and, especially, for the great re- 

 duction of their anterior transverse ledges. Thus, m.' has the ledge 

 reduced to a narrow rim not half a millimetre in breadth, m.^ is 

 entirely without it, m.^ has it too narrow to be seen from the 

 outside, and m.*, which has the largest ledge, has it still only as 

 broad as that on m.^ in the other allied species. In no cases are 

 there any traces of anterior connecting-ridges. Lower p.* rather 

 small in proportion, 5"3 millim. long. 



Dimensions. — Animal unknown. Skull, see next page. 

 Hab. Central Australia. 

 Type in collection. 



Of this species there is, up to the present, only known the single 

 skull here described, which was found among a collection of skulls 

 presented by Sir E. Owen, and on examination turned out to be 

 the specimen figured by that author (1. c.) under the name of 

 " M. (Boriogale) magnus." No specific description seems to have 

 been ever given of it, but the named and published figure forms a 

 sufficient claim to the authorship of the species. 



M. magnus is undoubtedly most nearly allied to M. rufus, but is 

 distinguished from it, as from all other Kangaroos, by the reduction 

 or absence of the anterior ledges of the molars, and by its longer 

 palatal foramina. It is very remarkable that a species so large as this 

 should have remained so long unknown, and it is much to be hoped 

 that the animal itself may soon be obtained and described. There is 

 of course a possibility that M. magnus may turn out to be identical 

 with M. isdbellinus, which, as already noted, is only known from an 

 imperfect skin. 



a. Ad. skull. " Far North," S. A. {F. G. Water- Sir R. Owen [P.]. 

 house). ( Type of species.) 



The following are the detailed dimensions of the skulls of the 

 large Kangaroos : — 



