82 PEOFESSOE OWEN ON THE FOSSIL MAMMALS OF AUSTEALIA. . 



in. lin. 



Least height of the foramen magnum 0 7 



Breadth between the upper ends of the condyles 14 



Breadth across the broadest part of the condyles 2 5 



Breadth across the paroccipitals 4 2 



Breadth across the mastoids 5 3 



Vertical diameter, or depth of the upper jaw, at and including the fore part 



of the camassial tooth .... 40 



Vertical diameter, or depth of the mandible, at and including the fore part 



of the carnassial tooth 3 0 



Other admeasurements are noted in the text. 



Description op the Plates. 

 PLATE 11. 



Side view of the skull, without the mandible, of the Thylacoleo carnifex : — nat. size. 



PLATE III. 



Base view of the skull of the Tkylacoleo carnifex : — nat. size. 



PLATE IV. 



Fig. 1. Front view of the skull of the Thylacoleo carnifex. 

 Fig. 2. Back view of the same skull. 

 Fig. 3. Upper view of the same skull. 



Fig. 4. Air-cells of the diploe above the cavity for the brain. 



Fig. 5. Outer side of part of the right mandibular ramus, with the carnassial {p 4) and 

 first molar (m 1). 



Fig. 6. Inner side of the same portion of mandible : the second molar {m -i) and the 

 incisive tusk [i) are indicated in outline. 



All the figures in this Plate are half the natural size. 

 The letters and figures are explained in the text. 



