1908.] MAMMALS FROM NORTH QUEENSLAND. 791 



Type. Adult female from Beach Mount. B.M. ISTo. 7.9.15.2L 

 Original number 330. Collected 5th May, 1907. 



This Rat would appear to be the commonest species of Central 

 Queensland, and it is probable that some of the specimens that 

 have been referred to M. gi^eyi, M. assimilis, 21. terrce-regince, and 

 other species really belong to it. The types of all the latter are 

 in the British Museum, and we have been able to assure ourselves 

 of its distinctness from them. 



Its only near relative as yet described is M. tunneyi of the 

 ISTorthern Territory, and from this it is distinguishable by its 

 longer tail, rather smaller size, and smaller bullae. 



Among the series obtained by Mr. Stalker, there is a good deal 

 of variation in the breadth of the teeth, the extremes being so far 

 apart as to suggest specific distinctness. No external characters 

 corresponding to the tooth differences can be found, however, 

 and we prefer for the present to put the whole series under one 

 heading. 



11. Mus sp. 

 ? . 437. 



An intermediate species not at present determinable. 



12. Mus PATRius, sp. n. 



d . 406, 411. 2 • 407, 408, 409, 410. 

 cj & $ in spirit. 



A Mouse of the fo7'resli-clelicatulus group, of about the size of 

 hermannshurgensis. 



Size medium within the group, decidedly larger than M. deli- 

 catulus. General colour above pale wood-brown, becoming slightly 

 more buffy on the sides. Belly greyish white, fairly sharply 

 defined, the bases of the hairs slaty, their tips white. Ears of 

 medium size, practically naked, their few fine hairs buffy. Hands 

 and feet white ; sole-pads 6, rather larger and less sharply defined 

 than in M. delicatulus, the sole between the pads naked. Tail 

 slightly longer than head and body, finely haired, brown above, 

 whitish on sides and below. Mammae — 2 = 4. 



Skull in size and shape agreeing with that of M. hermanns- 

 hurgensis, but the bullae of the normal small size, those of 

 Prof. Spencer's species being unusually large. 



Molars with the laminae obliquely twisted, as already described 

 in Mibs forresti, although not so much as in that species. A well- 

 marked anterior supplementary cusp present on m^. 



Dimensions of the type (measured in the flesh) : — 



Head and body 6.5 mm. (range up to 70) ; tail 66 (range to 71) ; 

 hind foot 18 ; ear 12. 



Skull — greatest length 22*7 mm. ; basilar length 1 7*2; nasals 

 8*2 ; interorbital breadth 3"2 ; breadth of brain-case 10'5 ; pala- 

 tilar length 10"1 ; diastema 6 ; palatal foramina 4*2 ; length of 

 upper molar series 4' 2. 



