BY R. BROOM. 
565 
which passes somewhat downwards. The large depression on the 
outer side is bounded in front by a well marked ridge, but does 
not communicate with the dental canal. The main portion of the 
jaw supporting the molars and the large premolar is very stout 
proportionately. In the upper jaw only the cheek teeth are at 
present known. There is a large premolar grooved and serrated 
as in the lower jaw, having six well marked grooves which run 
downwards and backwards. The grooves run parallel to the 
anterior border and leave the posterior and upper third of the 
tooth ungrooved. Behind the large premolar are three true 
molars : whether there may be a rudimentary fourth as in the 
lower jaw is at present unknown. The first is the largest. It 
has two moderately large blunt tubercles on the outer side, and 
two smaller ones on the inner, while a small fifth is situated at 
the anterior and inner corner. The upper third molar is small. 
The following are some of the principal measurements : — 
From 1st to 3rd upper molars 3*2 mm. 
Length of 1st upper molar 1*3 mm. 
Height of upper premolar ., . 1*7 mm. 
Length (antero-posterior) of upper premolar ... 2-0 mm. 
From 1st to 3rd lower molars 3 -5 mm. 
Length of lower incisor 6 "3 mm. 
From point of lower incisor to front of premolar 8-2 mm. 
Depth of lower jaw at 1st molar 3*5 mm. 
Locality. — Near Taralga, N.S.W. 
Geological Formation. — Pleistocene (V). 
Of this form I have discovered five or six moderately good 
lower jaws, the anterior portion of another, and three fragments 
of the upper. The hard matrix and the friable nature of the 
bones render it very difficult to develop the more delicate 
specimens, and in the case of Burr amy s the difficulty is enhanced 
by the obliquity of the large premolar, so that it becomes almost 
