212 MARSUPIALIA. 



40007. Part of the left ramus of the mandible of a slightly younger 



{Fig.) individual, showing the homologous teeth (except mm. 4). 



Figured in the ' Phil. Trans.' 1874, pi. xxiv. figs. 13-16, 



and also in the ' Extinct Mammals of Australia,' pi. ixxxiv. 



figs. 13-16, Presented by Sir D. Coojper, Bart, 1866. 



35962. Part of the right ramus of the mandible, showing all the 

 cheek-teeth ; from Gowrie. 



Presented by Sir D. Coojoer, Bart., 1861. 



38758. Part of the right ramus of the mandible, showing the last 

 three true molars ; from the Pleistocene of Darling Downs, 

 Queensland. Presented by F. JSf. Isaac, Esq., 1861. 



M. 51. The imperfect hinder part of the right ramus of the mandible, 

 showing the four true molars and the hinder half of pm. 4 ; 

 from Queensland. 



Presented by G. F. Bennett, Esq., 1880. 



Macropus rsechus (Owen '■). 



Syn. Protemnodon rcechuSy Owen ^. 

 Protemnodon antceus, Owen ^. 



The difi'erence in the length of the lower dental series of the two 

 forms to which the above names have been applied not being relatively 

 greater than that occurring in M. giganteus, both are regarded as 

 specifically identical. 



The mandible of this form agrees in its limits of size with that of 

 M. brehus, but is distinguished by the longer pm. 4 and the absence 

 of a distinct hind talon to m. 4. Since, however, as already mentioned, 

 a similar variation occurs in pm. 4 of the upper jaws included under 

 M. brehus, and the case of M. anah shows that a talon may be 

 present or absent in the lower molars of a single species, there is 

 every probability that the present form is merely a variety of the 

 former species. 



Hab. Queensland. 



35968. The anterior portion of the left ramus of the mandible, 



{Fig.) containing the first four cheek-teeth ; from the Pleistocene 



of Gowrie, Queensland. This specimen is the tj^pe, and is 



' Phil Trans. 1874, p. 281. — Protemnodon. - Loc. cit. 



^ Extinct Mammals of Australia, p. 448 (1877). 



