110 spencer and Walcoft : 



of the fragments, corresponding marks being often present on 

 the opposite surface, indicating the action of the teeth of both 

 jaws on the bones. Generally, however, the marks are con- 

 fined to one or both ends of the fragments, which often bear 

 evidences of having been bitten shai-ply off, while close to the 

 sharply-bitten end the surface is furrowed with teeth-marks, 

 showing that, whatever the animal was by the action of whose 

 teeth the marks were produced, it had a similar habit to that 

 which the dog and other caniivora possess, of holding one end 

 of the bone on the ground between the fore-paws, while it 

 gnawed the opposite free end. Few of the teeth-marked frag- 

 ments of the bones belong to the skeletons of the larger animals 

 whose remains occur in the deposit." 



There is not much to add to what Mr. Anderson has said 

 regarding the greater number of these specimens, and our 

 remarks on the South Australian bones apply equally well to 

 them. We might m.ention, however, that the marks stated by 

 Mr. Anderson to be too fine to have been produced by the 

 carnassial teeth of Thylacoleo are similar to those on the 

 Pejark bones, only not so abundant, and which we have shown 

 by experiment can be reproduced by pressure of the cutting 

 ■edges of these teeth. The specimens of special interest to us 

 from Myall Creek bear certain wedge-shaped gashes or notches 

 which make them comparable to the Colongulac bone, and we 

 defer a description of them until we deal with that specimen. 

 As in the cases of the South Australian and New South Wales 

 "bones, the ones from Queensland are quite devoid of the inte- 

 resting cuts exhibited by the Pejark specimens, but they differ 

 from all the others inasmuch as, with one exception, they do 

 not show the characteristic longitudinal fracturing. In 

 the majority of cases the breaks occur straight across the bones, 

 ■even in specimens of considerable thickness. Besides the fine 

 markings and gash-like cuts, which are identical with those on 

 specimens from elsewhere, there are present more or less 

 rounded punctures or pits, and in several instances longitudinal 

 ■cracks proceed from, and appear to be due to, them. Mr. De 

 Vis (4) has figured and described some of these pits, and puts 

 them down to the agency of Thylacoleo, a vicAv with which we 

 .are in agreement. We mentioned that certain of the South 



