612 OLDFIELD THOMAS 



hands and feet dull whitish ; soles of hind-feet sometimes with 

 five and sometimes with six pads. Tail about as long as the 

 body without the head, finely haired, uniformly blackish above 

 and below. Mammae !2 — 3 = 10. 



Interorbital region of skull narrow, and lightly ridged. Ante- 

 rior zygomatic plate well thrown forward. Palatine foramina 

 reaching one-third the length of m'^. Bullae fairly large. 



Dimensions of the two co-types , male and female, measured 

 in spirit : 



Head and body 158 and 144; tail 111 and Ilo; hind-foot 

 both 28; ear 18 and 17. 



Skull ( 9 ) basilar length 30; greatest breadth 18; interorbital 

 breadth 5; palate length 17.7; length of upper molar series 6.6. 



Ilab. Kapa Kapa. 



This species belongs to the Australian group of rats of which 

 Mus greyi , Gray is the most typical ; I can however find no 

 species quite agreeing with it. 



It is with much pleasure that I have dedicated this species 

 to Dr. R. Gestro, the distinguished entomologist, and Acting 

 Director of the Genoa Museum , to whose kindness I owe the 

 working out of this and several other interesting collections. 



20. Mus (?) sp. 



9 Moroka, 1300 m. October 1893. 



Mammae 1 — 2 = 6 



This rat has unfortunately lost the terminal portion of its tail, 

 and as it also has its molars so worn down as to render even 

 its generic position uncertain, I am compelled to leave it un- 

 determined. 



21. Wlus browni, Alst. 



103 from Aroma. 



8 Bara Bara. 



9 Kapa Kapa. 



1 each from Inavvi, Impara and ITnla. 



This name is used provisionally for Papuan examples of the 

 group to which Mas concolor, Bly. , Mus ephippmm , Jent. , 

 M. ivichmanni, Jent., M. maorium, Hutt., and M. exulans, Peale, 

 belong. They are all characterized by the possession of 2 — 2 =: 8 



