VI CONTENTS. 



Functions of relation Continued. Page. 



Vibracula 64 



Mucro 66 



Spines 66 



Radicular fibers ... 66 



Zooecia 66 



Form and size 66 



Total regeneration ... 67 



( 'alcified zooecia 6S 



Vestibular arch - 68 



Xnarium 68 



Terminology 68 



Habitat 69 



Principles of classification of the Cheilostomata 70 



Systematic classification of early Tertiary Cheilostomata 72 



Systematic descriptions 73 



Order Cheilostomata Busk 73 



Suborder Anasca Levinsen 73 



Division I . Malacostega Levinsen 73 



Family Electrinidae D'Orbigny, 1851 73 



Genus Electra Lamouroux, 1816 76 



Membranipora Blainville, 1834 77 



Heterooecium Hincks, 1892 78 



Pyripora D'Orbigny, 1852 78 



Herpetopora Lang, 1914 81 



Group Membraniporae Canu and Bassler, 1917 82 



Section I . Membraniporae without ovicell 86 



Genus Conopeum Norman, 1903 86 



Heliodoma Calvet, 1907 94 



Membraniporina Levinsen, 1909 94 



A canthodesia, new genus 99 



Adenifera Canu and Bassler, 1917 102 



Cupuladria, new genus 103 



Trochopora D'Orbigny, 1851 103 



Otionella Canu and Bassler, 1917 105 



Secti m II. Membraniporae with endozooecial ovicell 109 



Genus Vibracellina Canu and Bassler, 1917 110 



Setosellina Calvet, 1906 Ill 



Hinckeina Norman, 1903 Ill 



Ogivalina Canu and Bassler, 1917 117 



Membrendoecium Canu and Bassler, 1917 11!) 



Section III. Ovicell hyperstomial, always closed by the operculum 123 



Genus Periporosella Canu and Bassler, 1917 124 



Ellisina Norman, 1903 125 



Grammella Canu, 1917 130 



Membraniporidra Canu and Bassler, 1917 133 



Tremopora Ortmann, 1890 139 



Larnacius Norman, 1903 140 



Section IV. Ovicell never closed by the operculum 140 



Genus Alderina Norman, 1903 140 



Callopora Gray, 1848 145 



Amphiblestrum Gray, 1848 156 



Kamphonotus Norman, 1894 1 63 



Tegella Levinsen, 1909 165 



Stamenocella Canu and Baseler, 1917 , 168 



