311 



reversed. The reticulo-punctate markings are present at the anterior 

 surfaces of the enamel of the transverse ridges of the molars in the Tapir, 

 whilst in the Kangaroo and Dinothere the enamel is smooth and 

 polished : the molars of the Diprotodon are characteristically distinguished 

 by the rugose-punctate markings in both the anterior and posterior sur- 

 faces of the transverse ridges. 



The breadth of the crown of the present tooth is one inch and a half, 

 and the height of the entire posterior division is the same. 



From the alluvial or pleistocene tertiary deposits in the district of 

 Melbourne, Australia. Presented by Dr. Hobson. 



1496. The anterior part of the anterior transverse eminence of the last molar, 

 left side, lower jaw, of the same Diprotodon australis : it measures one 

 inch nine lines across the base, and diminishes in breadth more gradually 

 towards the summit than in the preceding tooth. The summit of this 

 eminence had just begun to be worn by mastication : the pulp-cavity is 

 continued into the basal third of the crown. 



From the alluvial or pleistocene tertiary deposits in the district of 

 Melbourne, Australia. Presented by Dr. Hobson. 



1497. The two fangs of a posterior molar of the Diprotodon australis. 



From the alluvial or newer tertiary deposits in the district of Mel- 

 bourne, Australia. Presented by Dr. Hobson. 



1498. Fragments of a caudal vertebra, equalling in proportions the fragment of 

 jaw and the teeth Nos. 1490 to 1496; and in the same condition as to 

 colour and loss of animal matter. 



From the alluvial or newer tertiary deposits in the district of Mel- 

 bourne, Australia. Presented by Dr. Hobson. 



1499. A fragment of a rib : it is one inch and a half broad and from six to 



nine lines thick ; equalling in size the anterior rib of a large Rhinoceros, 

 and presents the same colour and absorbent condition as the fragment 

 of jaw of the Diprotodon australis, No. 1460, with which it agrees in its 

 proportions. 



From the alluvial or newer tertiary deposits in the district of Mel- 

 bourne, Australia. Presented by Dr. Hobson. 



