CHAP. IV.] 



spinal nerves: birds. 



131 



H3 

 3 

 03 



O 

 tH 



d 



Q0" 



00 

 00 





Si 



r3 



o 



T3 



CD 



hi 



o 



03 



a 



'5b 

 ■g 



o 



r=5 OJ 



* *" 

 O O 



5 s 



m 



P3 



:e 



Ph 



3 

 ec 



_> 



"tUD 



03 



6D 

 3 



'? 



03 

 hi 



"3 



O 



hH 



9—2 



