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TABLE OF CONTENTS 



Page 



Preface I— III 



Terminology V— VII 



Morphological Part 1—87 



Calcification 1—7 



Cryptocyst and Gyninocyst 7 — 8 



Spines 9—10 



The Morphology of the Zorecium . . 10—22 



Rosette-Plates and Pores 22—32 



The Compensation-Sac 32—33 



Vestibulum 33—37 



The 0"perculum 37—46 



Polymorphism in the Bryozoa Ki — 49 



Ooecia 49—67 



The systematic characters in the 



Cheilostomatoiis Bryozoa 67—87 



The occurrence of one or several forms 



of individuals in the colony 71 — 73 



The Hcterozotecia 73 — 75 



Anatomical characters 75 — 76 



Calcification 76—77 



The frontal wall 77 



The pores ^. . . 77 



The spines 78—79 



Tlie primary aperture 79 — 84 



The peristome 84 — 85 



The operculum 85 — 86 



The rosette-plates 86 — 87 



Synopsis of the Families and Genera 88—90 



Systematic Part 88 



Order Cheilostomata 88 



Suborder Anasca 88 



1st Division: Malacostega 88 



Page 

 Family Acteidae 92—93 



— Bicellariidae 93—116 



— Farciminariidae 116—122 



— Flustridae 122—130 



— Scrupocellariidae 130—143 



— Mem))raniporidae 143—156 



— Cribrilinidae 156—161 



2nd Division: Coilostega 161 



Family Microporidae 161—166 



Group Tidiifera 



Family Steganoporellidae I(i7— 170 



— Aspidostomidae 171 — 175 



— Thalamoporellidae 176 — 196 



— Setosellidae 196 



— Chlidoniidae 196-201 



— Alysidiidae 201—207 



3rd Division: Pseudostega 206 



Family Membranicellariidae 207 



— Cellulariidae 209—213 



Suborder 'Ascophora 213 



Family Catenariidae 213—259 



— Onchoporidae 259—264 



— Euthyroidae 264—266 



— Crepidacanthidae 266—269 



— Euthyridae 269-273 



— Savignyellidae 273-274 



— nipi)othoidae 274-281 



— Adeonidae 282-289 



— Reteporidae 290-296 



— Myriozoidac 296—301 



— Sclerodomidae 301—304 



