Tertiary.'] PALEONTOLOGY OF VICTORIA. [Mammalia. 



that the Cams dingo is a truly indigenous and peculiar Australian 

 species, and not any variety of the domestic Dog, namely, that 

 taking the basicranial* axis as the standard of comparison (=100) 

 the sectorial tooth p. m. 4 and the first tubercular grinder above 

 m. 1 of the Dingo have only a ratio of 30 and 20 respectively, as 

 compared with 32*5 and 23 2 in the Wolf, which latter agrees 

 with the domestic Dog, although greatly larger than the proportion 

 in any of the South American species of Dog, between which and 

 the Old World Wolves and Dogs it is intermediate. 



EXPANATION OP FIGURES. 



Plate LXI. Fig. 1, palatine view of young skull with milk teeth, natural size. Fig. la, 

 same specimen, viewed from the side. Fig. 2, inner side of portion of left mandible with 1st true 

 molar, natural size. Fig. 2a, same tooth, viewed from outside (both figures reversed in printing), 

 natural size. Fig. 3, portion of upper jaw, right side, viewed from without (reversed in 

 printing), with 2nd, 3rd, and 4th premolars and the two true molars, natural size. Fig. 3a, 

 same specimen, viewed from above, natural size. Fig. 4, sectorial premolar of left side, natural 

 size (reversed). [Fig. 5, left mandible of Sarcophilus ursinus, natural size, viewed from outside 

 (reversed). Fig. 5a, same specimen, viewed from above. See Plates LXIL and LXIIL] 



FREDERICK McCoy. 



* A Itne In the bisected skull from the posterior edge of the basloccipltal bone, to junction of presphenoid and ethmoid 

 bones, or from the same point to opposite the middle of the interval between the optic and ethmoidal foramina, a little 

 behind the posterior extremity of the vomer. 



