HORN EXPEDITION—MAMMALIA. 
23 
In tlie upper jaw the first incisor is larger than tlie other three, and is 
separated from them by a diastema. The canine is large and strong and measures 
3 mm. or even .slightly more in length. P' is larger than and p‘‘, if present at 
all, is minute and tubercular and usually absent. 
In the lower jaw the three incisoi’s of each side are sub-equal, close together 
and to the canine, which is strong and measures 2'5 m.m. in height. is (piite 
wanting, and often lies close against or is separated from it by a slight 
diastema. 
The following are the dimensions of the skull of an adult female :— 
Basal length ... ... ... ... 34’5 
Greatest breadth ... ... ... 23'5 
Nasals, length ... ... .. ... 12 
,, greatest breadth ... ... ... 5 
„ least breadth ... ... ... 2‘5 
Intertemporal breadth ... ... ... 7 
Palate, length ... ... ... ... 18 
,, breadth between outer corners of vf ... 11 
Palatal foramen ... ... ... ... 5 
Ba.si-cranial axis ... ... ... ... 14 
Basi-facial axis ... ... ... ... 20 
Facial index ... ... ... ... 142‘8 
Teeth, horizontal length of... ... 1 
„ length ... ... ... 7’5 
,, breadth ... ... ... 2 
Habitat .—South and Central Australia. Mr. Kreflt’s specimen probably 
came from Lake Alexandrina, though the exact locality is doubtful, mine from 
Charlotte Waters, Central Australia, with the exception of two immature males 
kindly sent to me by Mr. E. C. Cowle, who procured them at Illamurta, in the 
James Range. To Messrs. Byrne and Cowle I am much indebted for their 
valuable assistance in securing specimens of this rare and interesting species. 
The native name is Amperta. 
The animal lives in burrows, which it lines with grass, in sandy and stony 
table-lands, thus forming another exception to the usual statement that the 
members of the genus Phascologale are exclusively arboreal.^ 
* c/. The description of Ph. macdonnellensis, an undoubted Phascologale. 
