336 



]549. The penultimate molar, right side, lower jaw, of the Thylacinus spelceus: 

 it differs from the corresponding tooth in the Dasyurus ursinus or Das. 

 laniarius in the larger and more distinctly developed third or posterior 

 lobe, in which character it agrees with the existing Thylacine ; but it 

 presents a difference, as compared with the penultimate molar of that 

 species, in having a small accessory cusp on the inner side of the large 

 middle compressed cusp ; which cusp is also less deeply and angularly 

 divided from the anterior lobe of the tooth. 



From one of the caves in Wellington Valley, Australia. 



Presented by Count Strzelecki. 



1549'. The left ramus of the lower jaw of the Hyaena or Dog-headed Opossum 

 of Van Diemen's Land {Thylacinus Harrisii}. 



Presented by Ronald Gunn, Esq. 



