TABLES OF CLASSIFICATION. 



301 



Included under the name of Choedata. 



■ Included under the name of 



Craniata, in distinction from 



Amphioxus. 



fl =3 =3 



t4 O O 



,a a. g- 



■ rt o _g 



a> ffl S 





a. 

 . o 



a 



<u 



w w lu i^ t-< 



i-q CS O PM m 



£ ■>! 





 o 



Pi 

 m 



O 



