COMPARATIVE ANATOMY OF THE TEETH. 



281 



cal, sharp-pointed and cutting crowns. The variations 

 from the type are found in the molars. 



We will give a few examples in illustration. The cat, 

 taken as the type of the order, has 28 teeth the upper 

 jaw having, on either side, incisors 3, canine 1, hicuspids 

 3, molar 1. In the lower jaw there are, incisors 3, canine 

 1, hicuspids 2, molar 1. 



In the upper jaw the first bicuspid has a single root, 

 with one exception. The second bicuspid has two strong 

 diverging roots; the third has three. In the lower jaw the 

 first bicuspid has two roots. The number of milk teeth in 

 the cat is 26. The upper jaw has, incisors 3, canine 1, 

 molars 3, on either side. In the lower jaw there are, in- 

 cisors 3, canine 1, molars 2. 



The dog has 42 teeth. (Fig. 76.) In the upper jaw there 

 are on either side, incisors 3, canine 1, bicuspids 4, mo- 

 lars 2. In the lower jaw there is an additional molar. 



There is a FIG. 77. 



single root to 

 the incisors, 

 canines, and 

 first.bicuspids 

 of both jaws, 

 all the rest 

 in the lower 

 jaw have two, 

 except the sec- 

 ond bicuspid, 

 which is con- 

 nate. The sec- 

 ond upper bi- 

 cuspid, which 

 is also called 



sectorial, has three roots, the first true molar has four, the 

 last three roots. 



FIG. 77 represents the deciduous and permanent teeth of the bear. 1 2 3 4 1) 

 Deciduous molars of the upper and lower jaw. p Permanent molars, d i 

 Deciduous incisors, c Canine teeth. 



