90 



HITCHCOCK'S ANATOMY 



quadrupeds generally consists of two pieces, the division being 

 made on the median line of the body. In the Hog, Horse 

 and Cow it consists of a single bone. In the Greenland 

 Whale it is in its simplest form, which is that of two arched 

 ribs. 



197. Form of Skull, of Orang Outangs. — Viewed as a 

 whole the form of the skull departs most from that of man in 

 the lowest orders. In the Ornithorynchus the face is pro- 

 longed into a beak or bill, and in the Horse the facial por- 

 tion of the head is four times larger than the cranial, exactly 

 the reverse of the case in man. In the young Orang Outangs 

 the form of the skull very closely resembles that of man, and 

 in the adult the size of the exterior of the cranium nearly 

 equals that of man, though its capacity is considerably less. 



198. Teeth of Quadrupeds, Carnivorous, Herbivorous, 

 Insectivorous and Barbed Teeth. — The Teeth of Mammals 

 vary exceedingly. They may, however, be classed under the two 

 divisions of flesh and vegetable eating, according to the food 

 of the animal. Those made to live on meat are sharp and 



pointed, for simply tearing the flesh 

 Fig. 100. into such small portions that it 



can be swallowed, while those eat- 

 ing herbs and grass, have the front 

 teeth with sharp edges like that 

 of a knife for cropping the food, 

 and back teeth with flat surfaces, 

 or vertical ridges of enamel in- 

 terspersed between the ivory or 

 dentine, which act the same 

 part when brought together with 



Teeth of a Lion (Carnivorous Animal ) a lateral motion, aS do the Upper 



What of the Lower Jaw ? 197. In what orders does the head differ most from that of 

 man? How does the skull of the Orang Outang differ from that of man? 198. What 

 are the two kinds of teeth among mammals? Describe each. Give the reason why the 

 teeth are furnished as they are. 



