PEDIGREE OF VERTEBRATES. 



205 



Osseous fish 

 Teleostei 



Ganoid fisii 

 Ganoidei 



V_ 



Vertebrate animals breathing throngh Itmgs 

 Amp hipn eumones 



Primseval fish 

 3. Fishes 



JBouijU^nostrtlcU 



Selachii 



Pisces 



Amphirrhina 



2. Eonnd-monthed 



Cyclostoma 



Singlr=nostrtIrti 

 animals Suit}) skulls 

 1. Tube-hearted 

 Leptocardia 



Monorrhina 

 Craniota 



Ascidiw 



Sea-barrels 

 Thaliacea 



5fetill4css animals 



Aciania 

 Utrtcbratr Animals 



Vertebrata 



tunicate Animals 

 lunicata 



Worms 

 Vermes 



