12 ZOOLOGICAL CLASSIFICATION OF THE DOG. 



classification originated with M. F. Cuvier, and has been adopted by most 

 naturalists. He reckoned three divisions of the dog : 



I. Those having the head more or less elongated, and the parietal bones 

 of the skull widest at the base and gradually approaching towards each 

 other as they ascend, the condyls of the lower jaw being on the same 

 line with the upper molar teeth. The Greyhound and all its varieties 

 belong to this class. 



II. The head moderately elongated, and the parietals diverging from 

 each other for a certain space as they rise upon the side of the head, 

 enlarging the cerebral cavity and the frontal sinus. To this class belong 

 our most valuable dogs, the Spaniel, Setter, Pointer, Hound, and the 

 Sheep-dog. 



III. The muzzle more or less shortened, the frontal sinus enlarged, 

 and the cranium elevated, and diminished in capacity. To this class 

 belong some of the Terriers, and a great many dogs that might very well 

 be spared. 



This division of the different species of the dog is adopted here as being 

 the most simple, intelligible, and satisfactory. 



