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enlarged olfactory capsules. The lateral or alar 

 cartilages of the external nose represent a forward 

 growth of the margins of the olfactory capsules. 



According to Broom, the median cartilage or 

 septum of the nose appears to have been derived 

 originally from a forward prolongation of the base 

 of the skull (presphenoid) and in the mammal-like 

 reptiles, marsupials and some other orders of 

 mammals it is still formed that way; but in man 

 and other primates the forepart of the septum 

 acquires a separate center of ossification and 

 becomes the mesethmoid bone. 



Schultz has shown (Fig. 88) that as develop- 

 ment proceeds the middle cartilage (septum) 

 grows forward and downward faster in man than 

 in the anthropoids and faster in the white race 

 than in the negro race; thus in the latter the 

 everted lips and more protruding front teeth are 

 associated with a less deep median septum and a 

 lesser downgrowth of the nasal tip. In adults of 

 all races the nose gets longer, narrower at the base 

 and more raised at the bridge. Thus babies and 

 young children have relatively shorter, less prom- 

 inent noses than adults (Fig. 87). 



The median partition (septum) that supports 



167 



