THE CLASSIFICATION OF ANIMALS 



57 



BRANCH XII. CHORD A 'TA 



(animals that have a notochord at some stage of their 

 development) 



Class I, 



Class II. 



Class III 



Class IV 



Class V. 



Class VI. 



Class VII. 

 Class VIII. 



Class IX. 



Adelochor'da (balanoglossids, et al.). 



Urochor'da (ascidians, et al.). 



Leptocard'ii (lancelets). 



Cyclostdm' ata (lampreys and hagfishes). 



Pisces (pis-sez) (fishes). 



Amphib'ia (frogs, toads, salamanders, water-dogs, 



et al.). 



ReptU'ia (snakes, lizards, turtles, alligators, et al.). 

 A'ves (birds). 

 M&mmdl'ia (mammals). 



