( I20 ) 



TABLE XX. 



Systematla Survey of the Phyhgenetio Glassification of 

 Vertebrates. 



I. Stall4nss (Acrania), or Eubtsfjcattctf (leptooardia). 

 Vertebrates without a Bpecialized head, skull, brain, or centralized heart. 



1. Sftull4(;ss 

 Acrania 



I. Tube. hearted 

 Lejptocardia 



1. Lancclets 



1. Amphioxida 



tl. 3(niinals tottt) sftulls (Craniota) and with ceittralijtS fjearta (Pachyoardia). 



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



centralized heart. 



Main-classes 



of the 



SJculled Animals. 



Classes 



of the 



SIcuUed Animals. 



Sub-classes 



of the 



Skulled Animals. 



Systematic Name 



of tlm 



Sub-classes. 



2. Singlts 

 i^0sttilIcB 

 monorhina 



3. W(in= 

 amtttDnate 

 Anamnia 



Animals 

 Amniota 



IT. Round mouths 

 I Gyclostoma 



III. Pishes 

 Pisces 



IV. Mud -fishes 

 Dipneusta 



V. Batrachians 

 Aniplhibia 



VI. Eeptiles 

 Reptilia 



VII. Birds 



Aves 



VIII. Mammals 

 Mammalia 



2. Hags, or 

 Mucous Fish 



3. Lampreys 



4. Primitive Fish 



5. Ganoid Fish 



6. Osseous Fish 

 f 7. Single-lunged 

 \ 8. Double-lunged 

 ( 9. Mailed Batra- 

 I chians 

 1 10. Naked Batra- 

 ( chians 



/ll. Lizards 



12. Snakes 



13. Crocodiles 

 , 14. Tortoises 



"^ 15. Sea. dragons 



16. Dragons 



17. Flying Reptiles 



18. BeakedAnimals 



!19. Long.tailed 

 20. Fan. tailed 

 21. Bush-tailed 

 122. CloacalAnimals 

 23. Pouched Ani- 

 mals 

 24. Placental Ani . 

 mals 



2. Hyperotreta 

 (Myxinoida) 



3. Hyperoartia 

 (Petromyzontia) 



4. Selachii 



5. Ganoides 



6. Teleostei 

 7.Monopneumones 



8. Dipneumones 



9. Phractamphibia 



10. Lissamphibia 



11. Lacertilia 



12. Ophidia 



13. Crocodilia 

 14 Chelonia 



15. Halisauria 



16. Dinosauria 



17. Pterosauria 



18. Anomodonta 



19. Saumrsa 



20. Oarinata3 



21. RatitEB 



22. Monotrema 



23. Marsupialia 



24. Plaoentalia 



