( 120 ) 



TABLE XX. 



Systematic Survey of the Phylogenetic Classification of 



Vertebrates. 



I. ,ShuII4css (Acrania), or ^ubr=f)rartcti (Leptocardia). 

 Vei'tebrates ■without a specialized head, skull, brain, or centralized heart. 



1. Skiill'Icss 

 Acrania 



I. Tube-heartcd 



Leptocardia 



1. Lancclets 



1. Amphioxida 



[I. Animals bit}) sfiiills (Craniota) and with rcntraltjcti Ijrarts (Pachycardia) , 

 Vertebrates with specialized head, with skull and brain, and with a 



centralized heart. 



Mdin-classes 



of the 



Skulled Animals. 



Cla^Fes 



of the 



SkulleJ. Aninals, 



Sub-classes 



of the 



Skulled Aninials. 



Systematic Xa'me 



of the 



Suh-classcs. 



2. Singles 

 0O3tnllcti 

 Monorhina 



3. Xon* 

 amnionate 

 Anamnia 



i. Amnion* 

 Animals 

 Anmiota 



II. Round months 

 Cyclcsfoma 



III. Fishes 

 Pisces 



IV. Mud -fishes 

 Dipneusta 



V. Batrachians 



Ain2)hihia 



I 

 \ 



VI. Eeptiles 

 "Bieptiluj, 



VII. Birds 

 Aves 



VIII. Mammals 

 iLTammalia 



2. Hi,2f3, or 



Mucous Fish 



3. Lampreys 



4. Primitive Fish 



5. Ganoid Fish 



6. Osseous Fish 



7. Sinc^le-lunged 



8. Double-lunged 



9. Mailed Batra- 



chians 



10. Naked Batra- 



chians 



11. Lizards 



12. Snakes 



13. Crocodiles 



14. Tortoises 



15. Sea-dragons 



16. Dragons 



17. Flying Eeptiles 



18. BeakedAnimals 



19. Long-tailed 



20. Fan-tailed 



21. Bush-tailed 



2. CloacalAnimals 



3. Pouched Ani- 

 mals 



24. Placental Ani- 

 mals 



2. Hyperotreta 

 (Myxinoida) 



3. Hyperoartia 

 (Petromyzontia) 



4. Selachii 



5. Ganoides 



6. Teleostei 



7.^[onopneumones 



8. Dipneumoues 



9. Phractamphibia 



10. Lissampbibia 



11. Lacertilia 



12. Ophidia 



13. Crocodilia 



14. Chelonia 

 15- lEalisauria 



16. Dinosauria 



17. Pterosauria 



18. Anomodonta 



19. Saururae 



20. Carinata9 



21. Ratitre 



22. Monotrema 



23. Marsupialia 



24. Placentiiia 



