Subclass Myophiurida Matsumoto 1915 Myophiuria 



Order *Ophiocystiida H. L. Clark Mss *Ophiocystiida 



Order *Aganasterida H. L. Clark Mss *Aganasterida 



Order Phrynophiurida Matsumoto 1915 Phrynophiurida 



Order Laemophiurida Matsumoto 1915 Laemophurida 



Order Gnathophiurida Matsumoto 1915 Gnathophurida 



Order Chilophiurida Matsumoto 1915 Chilophiurida 



Subphylum Echinozoa Leuckart 1848 Echinozoa 



Class Echinoidea Bromi 1860 : Echinoea 



Order *Bothriocidaroida Duncan 1889 Bothn'ocidarida 



Order Cidaroida Duncan 1889 Cidarida 



Order Centrechinoida Jackson 1912 Centrechinoida 



Suborder Aulodonta Jackson 1912 Aulodontina 



Suborder Stirodonta Jackson 1912 Stirodontina 



Suborder Camarodonta Jackson 1912 Camarodontina 



Order Exocycloida Jackson 1912 Exocycloida 



Suborder Holectypina Gregory 1900 Holectypina 



Suborder Echinoneina Hawkins 1925 Echinoneina 



Suborder Clypeastrina Gregory 1900 Clypeastrina 



Suborder Nucleolitina Hawkins 1925 Nucleolitina 



Suborder Cassidulina Hawkins 1925 Cassidulina 



Suborder Urechinina H. L. Clark 1925 Urechinina 



Suborder Spatangina Jackson 1912 Spatangina 



Order Plesiocidaroida Jackson 1912 Plesiocidarida 



Order Echinocystoida Jackson 1912 Echinocystina 



Order Perichoechinoida Jackson 1912 Periechoechinida 



Class Holothurioidea Semper 1868 Holothurea 



Order Dendrochirota MacBride 1909 Dendrochirotida 



Order Elasipoda Theel 1882 Elasipodida 



Order Aspidochirota MacBride 1909 Aspidochirotida 



Order Molpadonia Ekman 1925 Molpadonida 



Order Apoda Lampert 1885 Apodida 



Phylum Annelida Lamarck 1809 Annelida 



Class Archiannelida Hatschek 1878 Archiannelidea 



Class Polychaeta Grube 1850 Polychaetea 



Subclass Phanerocephala Benham 1894 Phanerocephalia 



Order Nereidiformia Benham 1894 Nereiida 



Order Spioniformia Soderstrom 1900 Spioniida 



Order Terebelliformia Benham 1894 Terebeilida 



Order Capitelliformia Benham 1894 Capitellida 



Order Scoleciformia Benham 1894 Scolecida 



Subclass Cryptocephala Benham 1894 Cryptocephalia 



Order Sabelliformia Benham 1894 Sabellida 



Order Hermelliformia Benham 1894 Hermellida 



Class Myzostoma Graff 1884 Mysostomea 



Class Oligochaeta Grube 1850 Oligochaetca 



Subclass Archioligochaeta Michaclsen 1921 Archioligochactia 



Subclass Neoligochaeta Michaelsen 1921 Neoligochaetia 



Class Hirudinea Lamarck 1818 Hirndinea 



Order Rhynchobdellida Blanchard 1887 RhyndioI)dellida 



[12 1 



