724 MAMMALIA [CH. 



Family 2. Suidae. 



Bunodontia of moderate size, in which the two outer 

 toes though complete are shorter than the others. 

 Ex. Sus, Babirusa, Dicotyles. 



Section B. Selenodontia. 



Artiodactyla with complex stomachs adapted for ruminating: 

 the cusps on the molars coalesce so as to form crescents. 



Family 1 Tragulidae. 



Small Selenodontia without horns, and with only three 

 compartments in the stomach : the outer toes although 

 excessively slender are still complete. 



Ex. Tragulus. 

 Family 2. Camelidae. 



Selenodontia without horns, with only three compart- 

 ments in the stomach : the outer toes entirely absent, the 

 inner toes slightly diverging below, the weight resting on 

 a pad behind them. 



Ex. CameluSy Auchenia. 



Family 3. Cervidae. 



Selenodontia with antlers in the form of bony outgrowths 

 of the frontal bone shed annually : four compartments in 

 the stomach : the second and fifth digits incomplete. 



Ex. Cervus, Cariacus, Capreolus, Rangifer, Alces. 



Family 4. Bovidae. 



Selenodontia with horns which are outgrowths of the 

 frontal, never shed, and covered with a thick horny sheath : 

 four compartments in the stomach : the second and fifth 

 toes rudimentary. 



Ex. Bos, Ovis, Ovibos, Haploceros. 



Family 5. Giraffidae. 



Selenodontia with short horns which are outgrowths of 

 the frontal, never shed, and permanently covered with soft 

 fur, four compartments in the stomach : immensely elongated 

 neck and very long limbs. 



Ex. Giraffa. 



