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PRINCIPLES OF ANIMAL BIOLOGY 



PHYLUM X. 



Class I, Crustacea 



Subclass I. Branchiopoda 



Order 1. Phyllopoda 



Order 2. Cladocera 

 Subclass II. Ostracoda 

 Subclass III. Copepoda 

 Subclass IV. Cirripedia 

 Subclass V. Malacostraca 



Order 1. Nebaliacea 



Order '2. Anaspidacea 



Order 3. Mysidacea 



Order 4. Cumacea 



Order 5. Tanaidacea 



Order 6. Isopoda 



Order 7. Amphipoda 



Order 8. Euphausiacea 



Order 9. Decapoda 



Order 10. Stomatopoda 

 Class II. Onychophora 

 Class ni. Myriapoda 



Order 1. Pauropoda 



Order 2. Diplopoda 



Order 3. Chilopoda 



Order 4. Symphyla 

 Class IV. Insecta 



Order 1. Aptera 



Order 2. Ephemerida 



Order 3. Odonata 



ARTHROPODA 



Order 4. Plecoptera 

 Order 5. Isoptera 

 Order 6. Corrodentia 

 Order 7. Mallophaga 

 Order 8. Tbysanoptera 

 Order 9. Euplexoptera 

 Order 10. Orthoptera 

 Order 11. Hemiptera 

 Order 12. Neuroptera 

 Order 13. Mecoptera 

 Order 14. Trichoptera 

 Order 15. Lepidoptera 

 Order 16. Diptera 

 Order 17. Siphonaptera 

 Order 18. Coleoptera 

 Order 19. Hymenoptera 

 Class V. Arachnida 



Order 1. Araneida 

 Order 2. Scorpionidea 

 Order 3. Phalangidea 

 Order 4. Acarina 

 Order 5. Pedipalpi 

 Order 6. Palpigradi 

 Order 7. SolifugjB 

 Order 8. Chernetidia 

 Order 9. Xiphosura 

 Order 10. Eurypterida 



GROUPS OF INVERTEBRATES OF MORE OR LESS UNCERTAIN SYSTEMATIC POSITION 



Group 1. Mesozoa 



Group 2. Nemertinea 



Group 3. Nematomorpha 



Group 4. Acantliocephala 



Group 5. Chaetognatha 



Group 6. Rotifera 

 Group 7. Bryozoa 

 Group 8. Pboronidea 

 Group 9. Brachiopoda 

 Group 10. Gephyrea 



PHYLUM XI. 

 SUBPHYLUM I. EnTEROPNEUSTA 



Order 1. Balanoglossida 

 Order 2. Cephalodiscida 



SuBPHYLUM II. TuNICATA 



Order 1. Ascidiacea 

 Order 2. Thaliacea 

 Order 3. Larvacea 



SuBPHYLUM III. CepHALOCHORDA 

 SuBPHYLUM IV. VeRTEBRATA 



Class I. Cyclostomata 



Subclass I. Myxinoidea 

 Subclass II. Petromyzontia 



CHORDATA 

 Class II. Elasmobranchii 



Subclass I. Selachii 

 Order 1. Squali 

 Order 2. Raji 



Subclass II. Holocephali 

 Class ni. Pisces 



Subclass I. Teleostomi 

 Order 1. Crossopterygii 

 Order 2. Chondrostei 

 Order 3. Holostei 

 Order 4. Teleostei 



Subclass II. Dipnoi 



