IV 
TABLE OF CONTENTS. 
Systematic descriptions—Continued. 
Order Cheilostomata Busk—Continued. Page. 
Family Thalamoporellidae Levinsen, 1909. 60 
Genus Manzonella Jullien, 1888. 60 
Genus Woodipora Jullien, 1888.• 61 
Genus Thalamoporella Hincks, 1887. 61 
Family Steganoporellidae Levinsen, 1909. 62 
Genus Steganoporella Smitt, 1873. 62 
Family Aspidostomidae Canu, 1908. 64 
Genus Odontionella Canu and Bassler, 1917. 64 
Genus Foraminella Levinsen, 1909. 66 
Genus Labiopora Levinsen, 1909 . 67 
Family*Calpensiidae, new family. 67 
Genus Diplodidymia Reuss, 1869. 67 
Genus Hemiseptella Levinsen, 1909... 69 
Genus Cupularia Lamouroux, 1821. 75 
Genus Calpensia Jullien, 1888... 82 
Genus V erminaria Jullien, 1888. 83 
Genus Microporina Levinsen, 1909. 83 
Genus Corynostylus Canu and Bassler, 1919. 84 
Family Cellariidae Hincks, 1880... 85 
Genus Cellaria Authors. 85 
Genus Erina Canu, 1908. 87 
Genus Melicerita Milne-Edwards, 1836 . 87 
Genus Euginoma Jullien, 1882. 87 
The Costulae (Family Cribrilinidae Hincks, 1880)... 87 
Genus Cribrilina Gray, 1848... 87 
Genus Puellina Jullien, 1886. 89 
Genus Metracolposa Canu and Bassler, 1917... 92 
Family Hippothoidae Levinsen, 1909. 92 
Genus Hippothoa (Lamouroux 1821) Hincks, 1880.. 92 
Genus Trypostega Levinsen, 1909. 95 
Family Escharellidae Levinsen, 1909... 95 
Group 1. Schizoporellae Canu and Bassler, 1917. 95 
Genus Schizoporella Hincks, 1880.... 95 
Genus Arthropoma Levinsen, 1909.,. 97 
Genus Dakaria Jullien, 1903. 97 
Genus Lacerna Jullien, 1888. 99 
Genus Stephanosella Canu and Bassler, 1917. 99 
Genus Stylopoma Levinsen, 1909... 101 
Genus Schizopodrella Canu and Bassler, 1917.. 104 
Genus Schizolavella Canu and Bassler, 1920. 108. 
Genus Schizomavella Canu and Bassler, 1920. 109 
Genus Gemelliporella Canu and Bassler, 1920. 110 
Group 2. Microporellae Canu and Bassler, 1917. 113 
Genus Fenestrulina Jullien, 1888. 113 
Genus Microporella Hincks, 1877. 117 
Genus Diporula Hincks, 1879....,. 126 
Genus Ellipsopora, new subgenus. 127 
Genus Flustramorpha Gray, 1848. 128 
Genus Calloporina Neviani, 1895. 128 
Genus Inversiula Jullien, 1888. 129 
Group 3. Hippoporae Canu and Bassler, 1917. 129 
Genus Hippoporina Neviani, 1895... 129 
Genus Hippodiplosia Canu, 1916. 131 
Genus Hippomenella Canu and Bassler, 1917... 132 
Genus Hippoporella Canu and Bassler, 1920. 132 
Genus Lepralia Johnston, 1847. 133 
