( 121 ) 



TABLE XXI. 



Pedigree of Vertebrates. (Gf. Plate XV) 



8. fHammals 

 Mammalia 



Osseous fish 

 Teleostei 



Ganoid fish 

 Qanoides 



Single-lunged 

 Monopnenmone.8 



Double-lunged 

 Dipneumones 



7. Birds 



Aves 



I 

 6. Reptiles 

 ReptiUa 

 I 



Mud -fish 

 Protopteri 



Smnton^ntmals 



Anxniota 



5. Batracfjians 

 Amphibia 



4. fffutefish 

 Dipneusta 



Primitive fishes Selachii 

 3. Fishes Pisces 

 Dottbl^nostrilUfc 

 Amphirhina 



Lampreys Hags 



Petromytontes Myxinoi'h 

 J t _l 



2. Round-mouths 



Cylostoma 



Sea-squirts 

 AscidicB 



5htgIe=nostrtIIctJ 

 SftulIeU*antmalji 



1. Tube-hearted 

 Leptocardia 



Monorhina 

 Craniota 



Sea-barrels 



Thaliacea 



JKaixtlcti Animals 

 Tunicata 



SbhilUUs* 



Acrania 



Ferttfarates 



Vertebrata 



Chortias&nimalg 



Chordoma 



Worms 

 Vermes 



