1906.] 



ARTICULATIOX OF THE VERTEDRATE JAW. 



115 



rendered impossible, because it is not only unnecessary to the 

 animal but would endanger the working of the shears b}^ allowing 

 their edges to get crossed. 



Text-fig. 34. 



Skull of Wolf. 



Text-fig. 35. 



Skull of Hare. 



Text-fig. 36. 



Diagram of jaws. Type 1. 



Type 2 is the herbivorous type of jaw. The molars are 

 required to meet simultaneously and to grind with equal force 

 upon the comparatively small morsels of food which have been 



