( 224 ) 



palate length, IT; diastema, 10; palatal foramina, 7-4: length of bullae, 9-.) ; 

 length of tipper molar series, 7.3 mm. 



Hab. Mary River, Northern Territory. 



Ti/pc : Female. No. CSo. Collected September 13th, 1002, by Mr. J. T. 

 Tnnney, in recognition of whose excellent collecting work the species is named. 



This stoutly built short-tailed rat may be readily distinguished from any of its 

 Australian allies by its ]iroportions and its white belly, most of the species having 

 grey bases to their belly hairs. 



7. Macropus antilopinus Gould. 



? 525. Burundie. 



S 526. Edith River. 



S 528, 529, 531. ? 530. Margaret River. 



(J 665, 669, 671, 678, 1442, 1454, 1459, 1462. ? 670, 672, 1444, 1448, 1449 

 1452, 1457, 1461, 1463. South Alligator River. 



S 1036. ? 1035. Eureka. 



? 14115. Union River Creek. 



It is a curious fact that in the wearing down and crashing of the anterior cheek 

 teeth so marked in this Kangaroo the small and delicate " p 4 " often stands its 

 ground after the much larger first molar succeeding it has been worn down or 

 dropped out. The anomalous condition of a jaw possessing a premolar followed by 

 three molariform teeth only may therefore occasionally be fouud. 



The striking sexual difference in the pattern of coloration in this Kangaroo is 

 worthy of special remark, for at first sight the two sexes appear to be of different 

 species. Gould's figure in his Monograph of Macropodidae shows very well the 

 dark crown, greyish face and parti-coloured ears of the female, but the same plate 

 as republished in the Mammals of Australia has been spoilt in the colouring, the 

 head being hopelessly wrong in several respects, notably in the sharp separation of 

 the upper from the lateral colour of the head, and in the ground colour of the 

 cheeks. Nor is the enlarged figure of the head in the same work any better. On 

 the other hand, the uniform foxy red of the head and ears of the male is well shown 

 in both works. 



8. Macropus robustus alligatoris subspec. nov. 



cJ. No. 1455. July 2ud, 19o3. South Alligator River. 



T//pe : " Chackarn " of natives. " Iris brown."— J. T. T. 



Fur nearly as short and close as in J/. ?: wooihcardi, much shorter than in 

 the other subspecies. Hairs of centre of fore-back and nape reversed forwards to 

 the crown from a whorl on the withers, as in M. r. icoodwardi* General colour 

 somewhat as iu M. r. erubescens, but less riclily rufous above, and duller below ; 

 fore-back a dull vinaceous fawn, darkening to a brownish fawn on the rump. Neck, 

 crown, and back of ears like fore-back, long hairs of inner side of ears whitish. 

 Mnzzle and cheeks dull brown, an indistinct whitish whisker mark present. Centre 

 of I liin with a prominent dull brown ])atch. Throat, chest and belly dull brownish 

 white, passing laterally and below into vinaceous fawn. Arms like fore-back, 

 darkening on the digits nearly to black ; hind-limbs proximally like the rump ; the 



* At least this is the case in the type, but Dr. CoUett informs me that the fur in his two 

 specimens (female and youug) is directed as in M. r. ernhfuccns. 



