IV TABLE OF CONTENTS 



Systematic descriptions — Continued. 



Order Cheilostomata Busk — Continued. 



Suborder Anasca Levinsen — Continued. 



Division 2. Malacostega Levinsen, 1909 — Continued. 



Family Alderinidae Canu and Bassler, 1927 — Continued. Page 



Genus Amphiblestrum Gray, 1848 104 



Genus Ellisina Norman, 1903 104 



Genus Allantopora Lang, 1914 107 



Genus Membraniporidra Canu and Bassler, 1917. _ 107 



Genus Alderina Norman, 1903 108 



Genus Cauloramphus Norman, 1903 109 



Genus Gephyrotes Norman, 1903 109 



Genus Frurionella Canu and Bassler, 1925 109 



Family Synaptacellidae Maplestone, 1911 110 



Genus Synaptacella Maplestone, 1911 111 



Genus Heterocella Canu, 1907 111 



Family Hiantoporidae MacGillivray, 1895 112 



Genus Tremopora Ortmann, 1890 112 



Genus Hiantopora MacGillivray, 1887 115 



Genus Tremogasterina Canu, 1911 117 



Family Arachnopusiidae Jullien, 1888 120 



Genus Exechonella Canu and Bassler, 1927 120 



Division 3. Coilostega Levinsen, 1909 123 



Family Opesiulidae Jullien, 1888 123 



Subfamily Onychocellidae Jullien, 1881 123 



Genus Onychocella Jullien, 1881 123 



Genus Rectonychocella Canu and Bassler, 1917. 126 



Genus Velumella Canu and Bassler, 1917 128 



Subfamily Microporidae Hincks, 1880 130 



Genus Dacryonella Canu and Bassler, 1917 130 



Genus Caleschara MacGillivray, 1880 134 



Genus Micropora Gray, 1848 137 



Genus Vibracella Waters, 1891, and Selenaria 



Busk, 1854 138 



Genus Monsella Canu, 1900 139 



Genus AndreeUa Jullien, 1888 139 



Family Calpensiidae Canu and Bassler, 1923 139 



Genus Microporina Levinsen, 1909 139 



Genus Cupularia Lamouroux, 1821 142 



Family Steganoporellidae Hincks, 1884 144 



Genus Steganoporella Smitt, 1873 144 



Genus Labioporella Harmcr, 1926 147 



Genus Siphonoporclla Hincks, 1880 149 



Family Thalamoporellidae Levinsen, 1909 150 



Genus Thalamoporella Hincks, 1887 150 



Genus Thairopora MacGillivray, 1882 154 



Family Aspidostomatidae Jullien, 1888 155 



Genus Mollia Lamouroux, 1821 155 



Genus Monoporella Hincks, 1881 155 



Genus Macropora MacGillivray, 1895 159 



Family Setosellidae Levinsen, 1909 161 



Genus Setosella Hincks, 1877 161 



Genus Crateropora Levinsen, 1909 162 



Genus Entomaria Canu, 1925 163 



