DESCRIPTION OF PSEUDOMYS NOVAE-HOLLANDIAE 13 
as this is done it would seem better to continue with the 
present division, and it is suggested that in place of the 
deposed novae-hollandiae, the oldest remaining species, alho- 
cmereus Gould, 1845, be elected as the genotype of the Gyomys 
group. 
References. 
1. Edgar R. Waite. Report of the Horn Scientific Expedition to Central 
Australia: Muridae. Pt. II, p. 405, 1896. 
2. E. Le G. Troughton. On two New Rats of the Genus Pseudomys. 
Records of the Australian Museum, xviii, p. 292, 1932. 
3. Oldfield Thomas. The Generic Arrangement of the Australian Murines 
hitherto referred to Mm. Ann. and Mag. Nat. Hist., (8), Vol. vi, 
p. 605, 1910. 
4. H. H. Finlayson. Preliminary Descriptions of Two New Mammals from 
South Australia. Trans. Roy. Soc. S. Aust., Vol. Ivi, p. 170, 1932. 
Explanation of Plate II. 
Fig. 1. Pseudomys (Leggadina) hermannsburgensis Waite. 
Fig. 2. Pseudomys (Leggadina) novae-hollandiae (Waterhouse). 
a, dorsal view of skull, X 2; b, lateral view of skull, X 2 ; c, ventral 
view of skull, X 2; d and e, first molar tooth, showing variation of 
cingular cusp, X 15. 
