THE HUMAN SKELETON, 73 



of the sound to this reverberating sinus. Snuff-taking, it 

 has been supposed, injures the voice by obstructing this 

 canal. 



A front view of the frontal bone ; <z, a, fronted sinuses ; 6, the tern- 

 poral arch, beneath which lies the temporal muscle, which closes the 

 lower jaw ; d, the supra-orbitary hole for a psssage of a branch of the 

 fifth pair of nerves. 



19. The shape of the head, as well as its size, varies great- 

 ly in different individuals. There are also national peculi- 

 arities in the form of the head, constituting a well-marked 

 national feature. Thus the Caucasian race, to whom we 

 belong, is distinguished by the beautiful oval form of the 

 head. To this race the most civilized nations belong, and 

 those which have ruled over the others. The Mongolian 

 race, which inhabits China and Japan, is known by its 

 prominent cheek bones, flat face, narrow and oblique eyes, 

 straight and black hair, thin beard, and olive complexion. 



2*0. The negro race has a compressed skull, and a flat- 

 tened nose, a prominent mouth, and thick lips ; thus bearing 

 some resemblance in features to the monkey tribe. The 

 North American Indian has a very singular shaped head ; 

 it being high from the ear upward, and short from the front 

 to the back. The fore-head is not as largely developed as 



