GIRAFFE 



151 



lobed crowns of the outermost of the four pairs of lower front teeth, 

 corresponding to the canines of carnivorous mammals (fig, 6y). They 

 are further characterised by the curiously rugose nature of the 

 enamel of all the teeth, which recalls that of the skin of the common 

 large black slug. The horns, again, which may be present in both 



Fig. 67. — Lower Front Teelh of Giraffe (A) and Elk (B), 

 to show the difference in the form of the canine. 



sexes, or only in the males, are short and covered with skin in the 

 living representatives of the family, although at their tips they may 

 have a small bare bony cap, comparable to the antler of a deer. 

 Another feature common to giraffes and okapis is the complete 

 absence of lateral hoofs, but as the same condition obtains in the pala 

 antelope, it cannot be regarded as a characteristic of family value. 

 Other distinctive features are to be found in the skeleton ; but as those 



