118 • FOSSIL JAWS OF MACROPODID.H, 



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, 

 Silieniirus 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 t3^pe showing p.'*^, 

 mp.'*^, m.^, m. -, and p.'^ exposed in its crypt. The premolars are 

 similar to those figured by Owen. The other examples are an 

 isolated p.*; a young maxilla with m. ^ m.- m"^ and the premolar 

 ready to emerge; two adult rami with all the true molars and 

 one young 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. 



Dirneniiions. 



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.'^ 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. agilis and ualabatits, 

 and the length of the premolar greatly exceeding that in H. 

 ruficollis and M. parryi, and even those of H. agilis and ualahatus, 

 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 



