246 



ERNST HAECKEL. 



III. — Sketch of a PJtylogenetic Classification of the Animal 

 Kingdom^ founded on the Gastraea- Theory and the 

 Homology of the Qerm-lamella, the Primitive Intestine, 

 and the Ccdom. 



'P3 



3 Syntagmata. 



8 Phyla. 



16 PflYLOCLABI. 



40 Classes. 



First principal 

 group of the 

 Animal King- 

 dom : Peo- 

 TOZOA. Pei- 



MITIVE AnI- - 

 MALS, without 



Germ- lamellae 

 or Intestine, 

 or Coelom or 

 Hsemolymph. 



I. 

 Protozoa. 



1. Ovularia. 



2. Infusoria. 



fr 



Monera. 



Amcebina. 



Gregarinae. 



{4. Acinetae. 

 5. Ciliata. 



O 



Second principal f 

 group of the 

 Animal King- 

 dom : An^- 



MAEIA. InTEE- 



MEDiATE Ani- 

 mals (blood- 

 less intestinal <J 

 animals), with 

 two primary 

 Germ- lamellae 

 and Intestine, 

 but without 

 Coelom and 

 Hsemolymph. 



II. 



Zoopnyta 

 (Ccelenterata). 



III. 



Acoelomi. 



3. Spongiae. 



4. Acalephae. 



5. Accelmio 



(Vermes I). 



Gastraeada. 



Porifera. 



CoraUa. 



Hydromedusae. 



Ctenophorae. 



Arclielininthes. 



Plathelmiathes. 



g, 



Third principal 

 group of the 

 Animal King- 

 dom : H ^.MA- 

 TABLi. Blood 

 Animals 



(blood- carrying 

 intestinal ani- 

 mals), animals 



IV. 



Coelomati. 



V. 



Mollusca. 



Coelomati 

 (Vermes II). 



VI. 



with two pri--^ Echinode'rmata. 

 mary Germ- 



lamellae, with 

 Coelom and 

 Haemolymph ; 

 all having at 

 the same time 

 a muscular and 

 a nervous sys- 

 tem. 



13. 



14. 

 15. 

 16. 

 17. 

 18. 

 -.19. 



7. Brachiopoda. "{ 20. 



pi. 



8. Otocardia. \ 22. 



[23. 



9. Colobrachia. \ 05 



26! 

 27. 





VII. 



Arthropoda. 



VIII. 

 (^ Vertebrata. 



11. Carides. 



12. Tracheata. 



ri3. Acrania. 

 14. Monorrbina, 



15. Anamnia. 



^16. Amniota. 



\ 28. 



r29. 



\ 30. 

 [31. 

 \ 32. 

 )33. 

 134. 



35. 



36. 



37. 

 r38. 

 \ 39. 

 [40. 



Nematelminthes. 



Polyzoa. 



Tunicata. 



Rliyuchoccela. 



Gephyrea. 



Rotatoria. 



Annelida. 



Spirobrancbia. 



Lamellibranchia. 



Cocblides. 



Cephalopoda. 



Asterida. 



Crinoida. 



Echinida. 



Holothuriae. 



Crustacea. 



Arachnida. 



Myriapoda. 



Insecta. 



Leptooardia. 



Cyclostoma. 



Pisces. 



Dipneusta. 



Halisauria. 



Amphibia,. 



Reptilia. 



Aves. 



Mammalia. 



