I'^Z Silencer and W<dcoft: 



Fig. 11. — Clay model cut through by the upper premolar of 

 Thylacoleo, illustrating the characteristic angle 

 formed by the middle of the cutting edge of the 

 tooth. 



Figs. \'2, 13,14. — Oblique cuts producing pointed ends to bone 

 fragments. Xote the similarity of form and 

 angle with the clay model (Fig. 1 1 ), cut with the 

 upper premolar of Thylacoleo. Fig. 17 is pointed 

 in the same manner, but the point appears to 

 have been induced by an incision, and the bone 

 is not cut through. Pejark Marsh. 



Fig. 15. — Clay model cut through with the lower premolar of 

 Thylacoleo, showing the curve left by the inner 

 side of the tooth. 



Fig. 16. — ^Piece of a thin bone with a similar curve to that of 

 the model (Fig. 15), cut with the lower premolar 

 of Thylacoleo. Pejark Marsh. 



Figs. 17, 18, 19. — Specimens showing concavities taken out 

 along the edges of the bones. Pejark Marsh. 



Plate XXXVIII. 



Fig. 1. — Longitudinal section of a large solid limb bone, show- 

 ing curved cuts at one end, which have removed 

 the cortex to a depth of about 3 mm. Found 

 near an aboriginal stone implement. Pejark 

 Marsh. 



Fig. 2. — '' The Buchan Bone." The cylindrical part of the 

 shaft of a kangaroo tibia, showing pieces sliced 

 out in the form of a double scallop, resembling 

 cuts produced artificially in clay by the upper 

 premolar of Thylacoleo. 



Fig. 3. — '' The Colongulac Bone." Dorsal view of the distal 

 part of the 4th metetarsal of a large extinct mar- 

 supial, probably Palorchestes, showing one of the 

 large notches ^vhich occur immediately under the 

 head of the bone. 



Fig 3a. — " The Colongulac Bone." side view, showing the con- 

 fluence of the two notches. 



