NOTOTHERIID^E. 165 



43577. The slightly imperfect mandible, showing the dentition in 



a well- worn state ; from Darling Downs. The cingulum 

 of the molars is strongly developed. 



Presented by Dr. George Bennett, 1872. 



M. 3637. Cast of the slightly imperfect left ramus of the mandible, 

 showing the four true molars ( m . i imperfect). The ori- 

 ginal was obtained from the Pleistocene near Lake Victoria, 

 South Australia, and is preserved in the Museum at 

 Adelaide ; it is figured by Owen in the ' Phil. Trans.' 

 1872, pi. vii., and pi. x. figs. 4-6, as well as in the ' Extinct 

 Mammals of Australia,' pi. xli., and pi. xliv. figs. 4-6, 

 under the name of N. victorias , of which it is the type. 

 One of the alleged specific characters is the posterior open- 

 ing of the dental canal being situated on the level of m. 4. 

 Presented by the Trustees of the Adelaide 

 Museum of Natural History, 1871. 



43578. Fragment of the left ramus of the mandible, containing m . 4 ; 



from Darling Downs. This specimen, which was referred 

 in MSS. by Owen to N. victorice, agrees very closely with 

 the preceding ; but the aperture of the dental canal is 

 placed higher up, being intermediate in position between 

 that specimen and No. 43577. 



Presented by Dr. George Bennett, 1872. 



46834. Part of the left ramus of the mandible of a large individual, 

 showing the four true molars in a well-worn condition ; 

 from Australia. Presented by Dr. George Bennett, 1874. 



39980. Part of the right ramus of the mandible, containing the first 

 three true molars in an imperfect condition ; from Darling 

 Downs. Presented by Sir D. Cooper, Bart., 1866. 



39979. Fragment of the left ramus of the mandible of a smaller 

 individual, showing m. 3 and m. 4 ; from Darling Downs. 

 Presented by Sir D. Cooper, Bart., 1866. 



43523. Hinder part of the left ramus of the mandible, showing the 

 (Fig.} last three true molars in an early stage of wear ; from 

 Queensland. Figured by Owen in the ' Phil. Trans.' 

 1872, pi. xi., and also in the 'Extinct Mammals of Aus- 

 tralia,' pi. xlv. The cingulum of the molars is strongly 

 developed. 

 Presented by H.K.H. The Duke of Edinburgh, K.G., 1872. 



