Suborder Aulodonta Jackson 1912 Aulodontina 



Suborder Stirodonta Jackson 1912 Stirodontina 



Suborder Camerodonta Jackson 1912 Camerodontina 



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 Perischoechinoida Jackson 1912 Perischoechinoida 



Order Echinocystoida Jackson 1912 Echinocystoida 



Order Perichoechinoida Jackson 1912 Periechoechinoida 



Class Holothurioidea Semper 1868 Holothurioidea 



Order Dendrochirota MacBride 1909 Dendrochirotida 



Order Elasipoda Theele 1882 Elasipodida 



Order Aspidochirota MacBride 1909 Aspidochirotida 



Order Molpadonia Ekman 1925 Molpadonida 



Order Apoda Lampert 1885 Apodida 



Phylum Priapuloidea Hyman 1940 Priapuloida 



Phylum Annelida Lamarck 1809 Annelida 



Class Archiannelida Hatschek 1893 Archiannelidea 



Class Polychaeta Grube 1851 Polychaetea 



Subclass Phaenerocephala Benham 1894 Phaenerocephalia 



Order Nereidiformia Benham 1894 Nereidiformida 



Order Spioniformia Soderstrom 1900 Siponiformida 



Order Terebelliformia Benham 1894 Terebelliformida 



Order Capitelliformia Benham 1894 Capitelliformida 



Order Scoleciformia Benham 1894 Scoleciformida 



Subclass Cryptocephala Benham 1894 Cryptocephalia 



Order Sabelliformia Benham 1894 Sabelliformida 



Order Hermelliformia Benham 1894 Hermelliformida 



Class Myzostoma Graff 1 884 My zostomea 



Class Oligochaeta Grube 1850 Oligochaetea 



Order Plesiopora plesiotheca Michaelsen 1930 Plesioptyorida plesiotheca 



Order Plesiopora prosotheca Michaelsen 1930 Plesiop^orida prosotheca 



Order Prosopora Michaelsen 1930 Prosoporida 



Order Opisthopora Michaelsen 1930 Opisthoporida 



Class Hirudinea Lamarck 1818 Hirudinea 



Order Rhynchobdellida Blanchard 1887 Rhynchobdellida 



Order Gnathobdellida Vaillant 1890 Gnathobdellida 



Order Pharyngobdellida Johansson 1913 Pharyngobdellida 



Phylum Echiuroidea Ricketts 1939 Echiuroida 



Class Echiurida Savigny 1817 Echiuridea 



Order Echiuroinea Bock 1942 Echiuroinida 



Order Xenopneusta Fisher 1946 Xenopneustida 



Order Heteromyota Fisher 1946 Heteromyotida 



Class Sactosomatida Fisher 1946 Sactosomatidea 



Phylum Sipunculoidea Hyman 1940 Sipunculoida 



Phylum Onychophora Grube 1851 Onychophora 



Phylum Arthropoda Siebold & Stannius 1845 Arthropoda 



Subphylum *Trilobita Schlotheim 1820 *Trilobita 



[11 1 



