BY C. W. DE VIS. 
113 
Crown mesially compressed, with a distinct mesial rib on each 
side. Basal rim on each side tumid, subnodular, especially on 
outer side, obscurely continuous round fore end. 
Molars. — (PI. xvn. fig. 20). Links high but narrow; on the outer 
side of the posterior base of m. 1 a rudimentary ledge-like talon. 
Sufficiently distinguished by the premolars from all other species 
recent and extinct. 
Halmaturus siva, n.s. 
Molars with curved crests, rounded angles and strong links. 
Lower premolar unilobate, narrow; intero posterior dilatation 
moderate, consisting apparently of two flat folds tapering off 
above into vertical ribs; anterior cusp small and ill-defined. 
Molars smooth, with long anterior talons, and without posterior 
groove or basal talon. The inner valley of the anterior talon 
subdivided by an accessory link in the two anterior molars. 
Dimensions. 
Mandibular. — The full set of adult cheek-teeth is 40*6 in 
length; the first three molars 244 and 24 - 9; the last three 28*8; 
the first two 17*2; the premolar 7*1. The width of m. 3 is from 
6*2 to 6*4 (4). The anterior depth of the mandible is from 18 - 0 
to 23-0 (4); the posterior from 1 2*9 to 18*1 (4); the thickness 
from 11-3 to 12-0 (3). 
In general size it agrees with the larger wallabies of the 
present day. 
Form. 
P. 4 (PI. xvn. fig. 21) diameters 7*1 x 2*7; crest over inner edge 
anteriorly, nearly level, curving inwards posteriorly; anterior 
cusp scarcely differentiated from the rest of the crown by a slight 
mesial impression on the inner side; posterior to this the inner 
side is rendered more concave by two successive folds ending 
above in sharp j)laits. 
Molars. — (PI. xvn. figs. 22-23). The anterior talons are in 
length nearly a third that of the entire tooth. 
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