XII CONTENTS. 



Page. 



Systematic descriptions of the Cyclostomata 651 



I. Division Inovicellata 652 



(a) Typical Cyelostomata 652 



Family Diastoporidae Gregory, 1899 652 



Forma Stomatopora Bronn, 1825 - - 652 



Proboscina Audouin, 1826 658 



Berenicea Lamouroux, 1821 669 



Diastopora Lamouroux, 1821 673 



Spiropora Lamouroux, 1821 674 



(b) Trepostomatous like ('yclostomata 675 



Family Heteroporidae Pergens and Meunier, 1886 675 



Genus Oeriopora Goldfuss, 1827 678 



Reptomulticava D'Orbigny, 1852 680 



Defranciopora Hamm, 1881 680 



Heteropora Blainville, 1830 - 681 



Multin-pscis D'Orbigny, 1852 684 



Fungella Hagenow, 1851 685 



Biflabellaria Pergens, 1894 685 



II. Division Ovicellata 686 



Subdivision Parallelata Waters 686 



Family Oncousoeciiclae Canu, 1918 687 



Genus Oncousoecia Canu, 1918 687 



Peristomoecia, new genus 692 



Forma Filisparsa D'Orbigny, 1853 693 



Family Crisiidae Johnston, 1847 703 



Genus Grisia Lamouroux, 1816 703 



Crisidia Milne Edwards, 1838 707 



Family Plagioeciidae < 'ami. 1918 707 



Genus Plagioecia Ganu, 1918 707 



Desmeplagioecia, new genus v 718 



Family Macroeciidae Canu, 1918 722 



Genus Macroecia Canu, 1918 722 



Family Mecynoeciidae Canu, 1918 722 



Genus Mecynoecia Canu, 1!>1S 722 



Forma Entalophora Lamouroux, 1821 734 



Genus Microecia Canu, 1918 735 



Exochoecia, new genus 737 



Family Diaperoeciidae Canu, 1918 738 



Genus Diaperoecia Canu, 1918 740 



Diplosolen Canu, 1918 : 745 



Lekythionia, new genus 747 



Crisulipora Robertson, 1910 749 



Desmediaperoecia, new genus 751 



Family Tubuliporidae Johnston, 1838 752 



Genus Tubulipora Lamarck, 1816 753 



Platonea, new genus 759 



Centronea, new genus 761 



Mesonea, new genus 762 



Erkosonea, new genus 763 



Pleuronea, new genus 765 



Tretonea, new genus 769 



Idmonea Lamouroux, 1821 770 



Idmidronea, new genus '. 784 



