IN GENERAL. 



larlty Is so very great, the general structure of the 

 animals cannot depart from this leading and chief 

 organ of the whole. The principal, it will be ob- 

 served, is detected in the relative development of 

 the cranial chamber that holds the brain, for, in 

 proportion to this increase of size, the instinctive 

 and intellectual faculties are found to be augmented. 

 In one group of domestic dogs, however, there is 

 one bearing evidence of a much greater departure 

 from the general similarity, — a departure leading to 

 ^ strong presumption that the typical animal was 

 taken from an aberrant species, — one more nearly 

 approximating the hyaena, and allied to Cams tricolor 

 or pictus of authors. The group is that of the mas- 

 tiff and our bulldog, whose structure will be exa- 

 mined in the sequel. 



We invite the attention to the difference in the 

 frontal line of the profiles, the relative position of 

 the orbits, and the strength of the great carnassier 

 molavy and it will be observed that the great Canada 

 wolf (if it be a wolf?) is possessed of a greater 

 development of the brain, less space for attaching 

 the muscles of the neck and jaws, a more plain 

 profile, and forms in general approximating the 

 dingo; and therefore we think the head belongs, 

 not to a true wolf, but to one of our group Lyciscus. 

 In the dingo. Cams Australice^ of our arrangement 

 Chryseus Australice^ we see the cerebral chamber 

 not greatly enlarged, the molars of middle propor- 

 tion, the incisor teeth nearly in a straight hne, dif- 

 fering from the jackal where they form a semicircle, 



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