TABLE OF CONTENTS. 
V 
Systematic descriptions—Continued. 
Order Cheilostomata Busk—Continued. 
Family Eecharellidae Levinsen, 1909—Continued. Page. 
Group 4. Peristomellae Canu and Bassler, 1917. 134 
Genus Trypematella Canu and Bassler, 1920. 134 
Group 5. Divers genera. 135 
Genus Cyclocolposa Canu and Bassler, 1920... 135 
Genus Cycloperiella Canu and Bassler, 1920... 137 
Genus’Cyclicopora Hincks, 1884. 138 
Genus Aimulosia Jullien, 1888.i. 139 
Family Eurystomellidae Levinsen, 1909. 141 
Genus Eurystomella Levinsen, 1909. 142 
Family Stomaclietosellidae Canu and Bassler, 1917.. 142 
Genus Leiosella Canu and Bassler, 1917. 142 
Family Smittinidae Levinsen, 1909. 143 
Genus Smittina Norman, 1903. 143 
Genus Porella Gray, 1848. 147 
Genus Palmicellaria Alder, 1864 .. 149 
Genus Rhamphostomella Lorenz, 1886. 151 
Genus Cystisella Canu and Bassler, 1917. 152 
Family Reteporidae Smitt, 1867.. 152 
Genus Retepora Imperato, 1599. 152 
Genus Phidolopora Gabb and Horn, 1862. 154 
Genus Rhynchozoon Hincks, 1891. 155 
Family Adeonidae Jullien, 1903. 158 
Genus Adeona (Lamouroux, 1816) Levinsen, 1909. 158 
Genus Bracebridgia MacGillivray, 1886... 160 
Genus Laminopora Michelin, 1842. 160 
Genus Adeonellopsis MacGillivray, 1886. 161 
Genus Anarthropora Smitt, 1867. 162 
Family Hippopodinidae Levinsen, 1909. 162 
Genus Metrarabdotos Canu, 1914..... 162 
Genus Hippaliosina Canu, 1918. 165 
Genus Tremogasterina Canu, 1911. 167 
Genus Cheiloporina, new genus..... 168 
Family Tubucellariidae Busk, 1884. 170 
Genus Tubucellaria D’Orbigny, 1852. 170 
Family Phylactellidae Canu and Bassler, 1917. 170 
Genus Phylactella Hincks, 1880. 170 
Genus Lagenipora Hincks, 1877. 171 
Genus Mastigophora Hincks, 1880. 172 
Genus Temachia Jullien, 1882. 173 
Genus Crepidacantha Levinsen, 1909.:. 173 
Family Celleporidae Busk, 1852. 174 
Genus Holoporella Waters, 1909. 174 
Genus Schismopora MacGillivray, 1888. 180 
Genus Costazzia Neviani, 1895. 181 
Genus Tegminula Jullien, 1882. 181 
Genus Cellepora Linnaeus, 1767. 182 
Family Myriozoidae Smitt, 1868. 185 
Genus Myriozoum Donati, 1750. 186 
Genus Myriozoella Levinsen, 1909. 186 
Family Orbituliporidae, new family. 186 
Genus Batopora Reuss, 1867... 187 
Genus Orbitulipora Stoliczka, 1861. 187 
