170 



ANATOMY AND PnYSIOLOGY OP 





a is 



b o rt d o o 





o 

 > 





® 2 



c3 cJ 



o 



g 0&. 



e3 

 o 



S 



o 



o 



o 

 GO 



n3 





1—1 



Ph 



c5 



c 



C3 



P5 



a, 

 GG 



— V — 



< 



O < 



SO 



H 

 H < 



C5 



a 



o 



