----------------+-------------------------+---------------------------+------------------ _Classes of the | _Sub-classes of the | _Orders of the | _Systematic Name Star-fishes._ | Star-fishes._ | Star-fishes._ | of the Orders._ ----------------+-------------------------+---------------------------+------------------ | { I. { 1. Primary Stars | 1. Tecastra { Sea Stars with radiated { 2. Articulated Stars | 2. Colastra I. { stomach { 3. Brisinga Stars | 3. Brisingastra =Sea Stars= { _Actinogastra_ | +Asterida+ { { II. { 4. Serpent Stars | 4. Ophiastra { Sea Stars with disc- { 5. Tree Stars | 5. Phytastra { shaped stomach { 6. Lily Stars | 6. Crinastra { _Discogastra_ { | | { III. { 7. Plated Lilies with | 7. Phatnocrinida { Lilies with arms { arms | { _Brachiata_ { 8. Articulated Lilies | 8. Colocrinida { { with arms | | II. { IV. { 9. Regularly budding | 9. Pentremitida =Sea Lilies= { Lilies with buds { Lilies | +Crinoida+ { _Blastoidea_ { 10. Lilies budding on | 10. Eleutherocrina { { two sides | | { V. { 11. Bladder Lilies | 11. Agelacrinida { Bladder Lilies { without stalks | { _Cystidea_ { 12. Bladder Lilies | 12. Sphæronitida { with stalks | | { VI. { 13. Palechinida with | 13. Melonitida { Older Sea Urchins { more than 10 | { (with more than { rows of ambulacral | { 20 rows of plates) { plates | III. { _Palechinida_ { 14. Palechinida with | 14. Eocidaria =Sea Urchins= { { 10 rows of | +Echinida+ { VII. { ambulacral plates |