12 PROCEEDINGS OF THE NATIONAL MUSEUM vol.69 



Genus ORTHOPORIDRA, new name 



Proposed for Orthopora Waters, 1904, preoccupied among Paleo- 

 zoic bryozoa. 



Genotype. — Orthopora compacta Waters, 1904. Recent. 



SYSTEMATIC CLASSIFICATION OF CHEILOSTOMATA 



Order CHEILOSTOMATA Busk 

 Suborder Anasca Levinsen 



Division 1. MALACOSTEGA Levinsen, 1909 



Family BIFLUSTRIDAE Smitt, 1872 



Acanthodesia Canu and Bassler, 1920; Cupuladria Canu and 

 Bassler, 1919; Adenifera Canu and Bassler, 1917; Trochopora 

 D'Orbigny, 1853; {Heteractis Gabb and Horn, 1862); Otionella 

 Canu and Bassler, 1917; Heliodoma Calvet, 1907; Conopeum Nor- 

 man, 1903 ; Quadricellaria D'Orbigny, 1851 ; G eUarinidra., new name 

 {Cellarina D'Orbigny, 1851, preoccupied) ; Mevhhranipora Blain- 

 ville, 1830 and M evibraniporina Levinsen, 1909 (artificial group for 

 unplaced Membraniporae) ; Biflustra D'Orbigny, 1852 (a general 

 term of no generic value) ; Pseudostega Brydone, 1918. 



Family ELECTRINIDAE D'Orbigny, 1851 



Nitscheina Canu, 1900, Electra Lamouroux, 1816 {Electrina and 

 Reptelectrina D'Orbigny, 1851, ArmuUpora Gray, 1848) ; Pyripora 

 D'Orbigny, 1852; Heterooeaium Hincks, 1892; Herpetopora Lang, 

 1914 ; Tretosina, new genus ; Mystriopora Lang, 1915 ; Tendra Nord- 

 man, 1839; Aspidelectra Levinsen, 1909; Taphrostoma Canu, 1905; 

 Rhammatopora^ Charixa, and DisteJopora., all of Lang, 1915, are 

 placed here with doubt. 



Family FLUSTRIDAE Smitt, 1867 



Flustra Linnaeus, 1761 (subgenera Carbasea Gray, 1848 and 

 Ghartella Gray, 1848) ; Sarsiilustra Jullien, 1903; SpiraXaria Busk, 

 1861 ; Retiiiustra Levinsen, 1909 ; Kenella Levinsen, 1909 ; Eetero-fius- 

 tra Levinsen, 1909 (artificial group for unplaced Flustridae). 



Family HINCKSINIDAE, new family 



Hincksina Norman, 1903; Memhrendoeeimn Canu and Bassler, 

 1917; Biselenaria Gregory, 1893 {Diplotaxis Reuss, 1867, preoccu- 

 pied) ; Setosellina Calvet, 1906; Aplomina, new genus; Cribrendoe- 



