1 66 



THE HISTORY OF CREATIOX. 



SYSTEMATIC SUEYEY 

 Of the 4 Classes, 9 Suh-classes, and 20 Orders of Starfishes. 

 (Compare Gen. Morph. 11. Plate IV. pp. 62-67.) 



Classes of the 

 Star-fishes. 



Sub-classes of the 

 Star-fishes. 



Orders of the 

 Star-fishes. 



Systematic Same 

 of the Orders. 



I. 



Sra Stars 

 Asterida 



n. 



5ra ILiltrs 

 Criuoida 



in. 



$ra J^rrfjins 

 Echinida 



rv. 



rra Cuntmbrrs^ 

 Holotliariae 



Sea Stars with ra- 

 diated stomach 

 Actinogastra 



n. 



Sea Stars with disc- - 

 shaped stomach 

 Discogastra 



in. 



Lilies with arms 

 Brachiata 



IV. 



Lilies with buds 



Blastoidea 



V. 



Bladder Lilies 



Cystidea 



VI. 



Older Sea Urchins 



(with more than 



20 rows of plates) 



PaleckinidM 



vn. 



ilore recent Sea 



Urchins (with 20 



rows of plates) 



Autechinida 



vm. 



Sea Cncumbers 



with aquatic feet 



Eujpod.ia 



JX. 

 Sea Cnctmabers 

 without aquatic 



feet 

 Apodia 



1. Primary Stars 



2. Articulated Stars 



3. Brisinora Stars 



8. 



Serpent Stars 

 Tree Stars 

 Lily Stars 



Plated Lilies with 



arms 

 Articulated Lilies 



with arms 

 9. Eegnlarly budding 



LUies 



10. Lilies budding on 

 two sides 



11. Bladder Lilies 

 without stalks 



12. Bladder Lilies 

 with stalks 



13. Palechinida with 

 more than 10 

 rows of ambu- 

 lacral plates 



14. Palechinida with 

 10 rows of am- 

 bulacral plates 



'15. Autechinida with 

 band-like am- 

 bulacra 



16. Autechinida with 

 leaf -like ambulacra 



/■17. Eupodia with scu- 

 tiform tentacles 



18. Eupodia with 

 branching ten- 

 tacles 



19. Apodia with water- 

 lungs 



20. Apodia without 

 water-limgs 



1. Tocastra 



2. Colastra 



3. Brising- 



astra 



4. Ophiastra 



5. Phytastra 



6. Crmastra 



7. Phatnocri- 



nida 



8. Colocrinida 



9. Pentremi- 



tida 



10. Elenthero- 



crina 



11. Agelacri- 



nida 



12. Sphseroni- 



tida 



13. Melonitida 



14. Eocidaria 



15. Desmo- 

 sticha 



16. Petalo- 

 sticha 



17. Aspidochi- 

 rota 



18. Dendroehi- 

 rota 



19. Lioderma. 



tida 



20. Synaptida 



