Class Bryozoa — Order Cheilostomata. 
72 
BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 
SYSTEMATIC CLASSIFICATION OF EARLY TERTIARY 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 Aseophora 
(Compensation sac present.) 
Division Malacostega. . 
Electrinidae D’Orbigny, 1851. 
Membraniporae Canu and Bassler,'1917 . 
Aeteidae Smitt, 1867. 
Scrupocellariidae Levinsen, 1909. 
Farciminaridae Busk, 1852. 
Eucratiidae Hincks, 1880. 
.Chaperiidae Jullien, 1888. 
Division Coilostega < 
'Opesiulidae Jullien, 1888 (Subfamilies 
Onychocellidae, Microporidae, and 
Lunularidae). 
Steganoporellidae Levinsen, 1909. 
.Thalamoporellidae Levinson , 1909. 
fMembranicellariidae Levinsen, 1909. 
Division Pseudostega . < Cellariidae Hincks, 1880. 
[Coscinopleuridae Canu, 1913. 
’Costulae. 
Acroporidae Canu, 1913. 
Hippothoidae Levinsen, 1909. 
Escharellidae Levinsen, 1909 (Groups Schizoporellae, Hippo- 
porae, Peristomellae, and Micropore llae). 
Stomachetosellidae Canu and Bassler, 1917. 
Smittinidae Levinsen, 1909. 
Reteporidae Imperato, 1859. 
Galeopsidae Jullien, 1903. 
Hippopodinidae Levinsen, 1909. 
Tubucellariidae Busk, 1884. 
Catenicellidae Busk, 1852. 
Adeonidae Jullien, 1903 
Phylactellidae Canu and Bassler, 1917. 
Celle poridae Busk, 1852. 
Conescharellinidae Levinsen, 1909. 
