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The Museum Gazette 



There are no canine teeth, and in the massive iower jaw no 

 incisor teeth are ever cut. The rudiment of one is, however, 

 present in the jaw. It may be noted that the bones carrying 

 the upper incisors do not become united to those of the upper 

 jaw. The back teeth (chewing teeth), are only four, five, or 

 six in number in the dugong, whereas in the manati there 

 may be twenty. A remarkable tendency to vary in their 

 dentition is characteristic of this group of animals, and is no 

 doubt in relation with differences in food. A recently extinct 

 member of the family (Steller's sea-cow) had no teeth at all, 

 but masticated the soft sea-weeds on which it fed by the aid 

 of a horny palate (Rhytina Stellevi). 



HEAD OF THE WART HOG (Phacochcevus /Ethiopicus). 



The Wart Hog is a native of Africa. His name makes 

 reference to a pair of wart-like excresences, which are formed, 

 one under each eye. These may be an inch and a half in 

 length. 



There is an enormous development of the base of the 

 zygoma. The incisor teeth in the upper jaw are often want- 

 ing, and sometimes those in the lower also. The snout is 

 short and square. The so-called warts are fleshy skin-growths 

 and may be large enough to look like ears. 



There is another Wart Hog (CEliani), met within Abyssinia, 

 It differs from the Cape Wart Hog in that its incisor teeth in 

 both jaws are more persistent. It has two " warts." 



THE SKULL OF A PIG (Sits scrofa). 

 The skulls of most of the swine family may bd recognised 

 by the long face, and the large size, in both jaws, of their 

 dog-teeth or tusks. These are especially large in the male 

 sex, and are often curiously curved, those of the upper jaw 

 upwards, and those of the lower outwards and upwards. The 

 incisor, or biting, teeth vary very much in different species 

 and at different ages. They are often shed early, especially 

 those of the upper jaw. In some pigs the lower incisors are 



