124 FOSSIL JAWS OF MACROPODID^E, 



hinder lobe, compressed, acuminate and separated from the lobe 

 by a deep notch both superiorly and posteriorly. 



The vertical groove on the hinder surface of the molars is 

 sometimes double; frequently its base is enclosed by an elevated 

 rim which may bulge outward and convert the groove into a deep 

 pocket. 



Maxillary. — P.^ (PL xviii. fig. 14) has a general resemblance to 

 the lower premolar, but the anterior lobe is much shorter and lower 

 than the posterior, the long compressed blade of which bears low 

 down on its intero-posterior surface a small trihedral pointed cusp. 

 On the intero-anterior base of the fore lobe is a tumid margin rt, 

 representing perhaps the last trace of an inner ledge. Mesial 

 diameters 10-5 x 4 -7. 



P. 3 (PI. XVIII. fig. 13) is almost equally bilobed; the maiden state 

 of its surface is not exemplified, but from vestiges left in the worn 

 tooth it may be safely said to have had a ledge running the whole 

 length of its inner side and terminating in an intero-posterior 

 cusp; the hinder lobe is furnished with a well developed extero- 

 posterior cusp (a, PL xviii. fig. 15), a feature which occurs in the 

 recent M. giganteus, but in one other instance only among 

 extinct Macropods in Sthenuriis. 



Examples — two hiutdred and eighty-thrre. 



The collection embraces 134 adults, 40 adolescents, and 47 

 young mandibles — 47 adult and 15 young maxilLe, besides 

 isolated teeth in large number. The identity of young specimens 

 has in the great majority of instances been established by extrac- 

 tion of the permanent premolars from their crypts. 



It may be observed that Owen's JJ. tiiaii, from the Wellington 

 Caves, has not been recognised among the fossils of the Darling- 

 Downs. 



Macropus pan, n.s. 



Molars elongate with curved crests, rounded angles and strong 

 links. Anterior upper molars with the outer midvalley divided 

 by a vertical plate; all wath an adpressed fold posteriorly. Lower 



