FAUNA AMERICANA. 77 



other, and in this manner give rise to the innu- 

 merable varieties which at the present day are 

 found scattered over the face of the earth : thus 

 the domestic dog of the North American Indians, 

 bears a strong resemblance to the wolf, not only 

 in its erect and pointed ears, general colour of its 

 body, &c. but this resemblance is further traced 

 in the construction of the cranium and teeth, 

 which partake in some degree both of the dog 

 and wolf; in the former the jaws are less elonga- 

 ted, and display a greater breadth posteriorly; 

 the molar teeth on each side of both jaws being 

 more widely separated ; the zygomatic fossae are 

 less capacious; the surface for the attachment of 

 the temporal muscle less extensive, and the fore- 

 head considerably more elevated in the Indian 

 dog ; the facial angle of the prairy wolf is twenty 

 six degrees, that of the Indian dog, thirty-five. 

 These differences are yet more obvious when we 

 compare the cranium of the common domestic 

 dog with that of the wolf 



The same observations will apply with nearly 

 equal force to the domestic dog of the East 

 Indies; with this difference, viz. in the latter 

 there exists a strong resemblance to the Jackall^ 

 to which also it is further allied in its howl, and 

 other less observable particulars ; indeed a suc- 

 cessful union of the dog and jackall has repeat- 

 edly taken place. 



In corroboration of the above, we may add that 



