72 



BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 



SYSTEMATIC CLASSIFICATION OP EARLY TEHTIAKY CHEILOSTOMATA. 



We have inserted the following table showing the classification of the bryozoa 

 here described in order to have a graphic aid in comprehending their position : 



Suborder Anasca 



(Compensation sac wanting.) 



Suborder Ascophora 



(Compensation sac present.) 



Division Malacostega. . 



DivUion Coilostega.. . 



Electrinidae D'Orbigny, 1851. 

 Membraniporae Canu and Bassler, 1917 . 

 Aeteidae Smitt, 1867 . 

 Scrupocellariidae Levinsen, 1909. 

 Farciminaridae Busk, 1852. 

 Eucratiidae Hincks, 1880. 

 Chaperiidae Jullien, 1888. 



Opesiulidae Jullien, 1888 (Subfamilies 

 Onychocellidae, Microporidae, and 

 Lunularidae). 



Stefjanoporellidae Levinsen, 1909. 



Thalamoporellidae Levinsen, 1909. 



fMembranicellariidae Levinsen, 1909. 

 Division Pseudostega . < Cellariidae Hincks, 1880. 



(.Coscinopleuridae Canu, 1913. 

 'Costulae. 



Acroporidae Canu, 1913. 

 Hippothoidae Le\-insen, 1909. 

 Escharellidae Levinsen, 1909 (Groups Schizoporellae, Hippo- 



porae, Peristomellae, and Microporellae). 

 Stomachetosellidae Canu and Bassler, 1917. 

 Smittinidae Le\-insen, 1909. 

 Reteporidae Imperato, 1859. 

 Galeopsidae Jullien, 1903. 

 Hippopodinidae Levinsen, 1909. 

 Tubucellariidae Busk, 1884. 

 Catenicellidae Busk, 1852. 

 Adeonidae Jullien, 1903 

 Phylactellidae Canu and Bassler, 1917. 

 Celleporidae Busk, 1852. 

 Conescharellinidae Levinsen, 1909. 



