CONTENTS. 
XI 
Systematic descriptions — Continued. 
Order Cheilostomata Busk — Continued. 
Suborder Ascophora Levinsen, ] 009 — Continued. 
Family Phylactellidae Canu and Bassler, 1917 — Continued. Page. 
Genus Lagenipora Hincks, 1877 591 
Ascosia Jullien. 1882 592 
Temachia Jullien, 1882 592 
Family Cellejioridae Busk, 1852 592 
Genus Schismopora MacGillivray, 1888 598 
Osthimosia Jullien, 1888 601 
Costazzia Neviani, 1895 603 
Holoporella Waters, 1909 604 
Acanthionella Canu and Bassler, 1917 614 
Kleidionella Canu and Bassler, 1917 617 
Family Conescharellinidae Levinsen, 1909 622 
Genus Fedora Jullien, 1882 623 
Stichoporina Stoliczka, 1861 624 
Schizorthosescos Canu and Bassler, 1917 626 
Orbitulipora Stoliczka, 1861 628 
Batopora Reuss, 1867 - 629 
Diplotaxis Reuss, 1867 629 
Conescharellina D’Orbigny, 1851 630 
BipOra Whitelegge, 1887 631 
Flabellipora D’Orbigny, 1852 631 
Mamillopora Smitt, 1872 632 
Order Cyclostomata 633 
General consideration of the Cyclostomata 634 
The tubes 634 
Calcification 634 
Cylindrical tubes or trepostomatous like Cyclostomata 636 
Clubshaped tubes or typical Cyclostomata 637 
Tubes with facets 637 
Tubes with rhomboidal orifice 637 
The orifice or apertura • 040 
Diaphragms 640 
Accessory tubes 641 
Tergopores 641 
Firmatopores 643 
Nematopores 643 
Dactylethrae 644 
Cancelli 644 
Adventitious tubes 645 
Vacuoles 645 
Mesopores 645 
Gemmation ^ 647 
Zoarium 648 
Form 648 
Basal system of fixation 648 
Growth 648 
Branching 649 
Origin of the zoarium 650 
Ovicells 651 
■e 
