118 
FOSSIL JAWS OF MACROPODIDjE, 
most likely to have yielded that fossil, and is identified with it on 
that account alone; if in error, the fault must lie with the 
describer of an object not susceptible of sufficient description. 
Halmaturus minor, Ow. 
Sthenurus minor, Owen, VIL 1877, p. 353. 
Macropus minor, Lydekker, IV. p. 218. 
But seven examples of this species have been found; one is a 
maxilla in the same stage of growth as the type showing p. 3 , 
mp. 4 , m. 1 , m. 2 , and p. 4 exposed in its crypt. The premolars are 
similar to those figured by Owen. The other examples are an 
isolated p. 4 ; a young maxilla with m. 1 m. 2 m :3 and the premolar 
ready to emerge; two adult rami with all the true molars and 
one }^oung ramus with all the cheek-teeth, but with these unfit 
for description. (PI. xviii. figs. 1-2). 
Halmaturus sp. 
Molars with rectilinear crests, sharp angles and feeble links. 
Lower premolar elongate, apparently with an intero-posterior 
cusp. Molars without posterior grooves or distinct talon. 
Dimensions. 
Mandibular. — The length of the full series of true molars is 
28-7; the premolar between 8*5 and 9'0 (estimated). The width 
of m. 8 is 5*8. The anterior depth of the mandible is 17"0; the 
posterior the same; the thickness 11-6. 
The length of the molar series being greater than the extreme 
length in //. dorsalis and all wallabies inferior to it in size, while 
its width is much less than the least in H. ayilis and ualabatus, 
and the length of the premolar greatly exceeding that in H. 
ruficollis and M. parryi, and even those of H. agilis and ualabatus, 
it is clear that this mandible is not referable to any known 
species. 
In the only example extant the premolar is imperfect in length, 
and both it and the molars have been so long in wear as to 
