IN THE LOWEE ANIMALS, ETC. 



231 



ence. The canines, when they exist, are almost 

 invariably longer than the other teeth, and there 

 is a space between the lateral incisor and the 

 upper canine, permitting the lower canine to shut 

 up closely in front of the upper ; thus greatly 

 increasing the efficiency of these teeth, whether 

 employed, as in the camivora, for securing their 

 prey, or, as in the monkey-tribe, for self-defence. 



The molar teeth, which are succeeded by others 

 in the vertical direction, as in the replacement of 

 the human temporary molars by the bicuspides, 

 are called premolars or false molars; while the 

 teeth which are developed in the horizontal plane, 

 and succeed each other from behind, corresponding 

 with the himaan permanent molars, are called true 

 molars. 



Among all the animals of the order camivora, 

 the organs of destruction reach their highest 

 development in the cat family : I will therefore 

 take the Bengal tiger as an illustration. 



Fig. 'ih—SkuH of Tiger. 



