------------------+-----------------------+----------------------+----------------- _Tribes or Phyla_ | _Main Classes_, | _Classes_ |_Systematic Name_ _of the_ |_Branches or Clades_ | _of the_ | _of the_ _Animal Kingdom._ | _of the_ | _Animal Kingdom._ | _Classes._ | _Animal Kingdom._ | | ------------------+-----------------------+----------------------+------------------ A. { =Primæval= { I. Egg-animals { 1. Archaic animals 1. Archezoa =Animals= { _Ovularia_ { 2. Gregarines 2. Gregarinæ { { 3. Infusoria 3. Infusoria +Protozoa+ { {II. Mulberry animals { 4. Planæads 4. Planæadas { _Blastularia_ { 5. Gastræads 5. Gastræadas B. { =Animal= { III. Sponges { 6. Sponges 6. Porifera =Plants= { _Spongiæ_ { { +Zoophyta+ { IV. Sea-nettles { 7. Corals 7. Coralla { _Acalephæ_ { 8. Hood-jellies 8. Hydromedusæ { { 9. Comb-jellies 9. Ctenophora C. {V. Bloodless worms {10. Planary worms 10. Platyhelminthes =Worms= { _Acœlomi_ { {11. Round worms 11. Nemathelminthes +Vermes+ { VI. Blood-bearing {12. Moss-polyps 12. Bryozoa { worms {13. Sac-worms 13. Tunicata { _Cœlomati_ {14. Proboscideans 14. Rhynchocœla { {15. Star-worms 15. Gephyrea { {16. Wheel animalcules 16. Rotatoria { {17. Ring-worms 17. Annelida D. {VII. Headless shellfish {18. Lamp-shells 18. Spirobranchia =Molluscs= { _Acephala_ {19. Mussels 19. Lamellibranchia { +Mollusca+ { VIII. Head-bearing {20. Snails 20. Cochlides { _Eucephala_ {21. Cuttles 21. Cephalopoda E. { IX. Ringed-arms {22. Sea-stars 22. Asterida =Star-fishes= { _Colobrachia_ {23. Lily-stars 23. Crinoida { +Echinoderma+ { X. Armless {24. Sea-urchins 24. Echinida { _Lipobrachia_ {25. Sea-cucumbers 25. Holothuriæ