CONTENTS. 



Pajje. 



Introduction 403 



PART I. 



GeNERAI- MoRPHOLOtiV 409 



Column Wall 409 



Randplatte or Edge-zone, Coenosarcj Coenenchyme , 411 



Form and Anatomy 413 



Ectoderm 415 



Mesoglcea , 416 



Endoderm and Sphincter muscle 416 



Expansion and Retraction of Polyps 418 



Tentacles 421 



Tentacles of Madrepora and Porites 426 



Tentacles of Siderastrwa and Agarkia 427 



Order of appearance of Protot«ntacles 430 



Metatentacles 432 



Oral Disk 432 



Mouth and Stomodajum 435 



Coloration , 437 



Mesenteries 440 



Mesenteries in genera reproducing by Budding 446 



Mesenteries in genera reproducing by Fission 448 



Development of Protocnemes 450 



First cycle of Metacnemes 455 



Second cycle of Metacnemes 459 



Appearance of Mesenteries in Polyps reproducing by Fission 465 



Increase of Mesenteries in Poriles 466 



Increase of Mesenteries in Ifadrepora 471 



Mesenterial Filaments " 471 



Glandular modifications 473 



Mesenterial Filaments of Afadri'pora and Porites 474 



Extrusion of Mesenteries and Filaments 475 



Origin of Mesenterial Filaments 476 



Basal Disk, Skeletotrophic or Skeletogenic tissues 479 



Endoderm 480 



Mesoglu-a 481 



Ectoderm or Calicoblast layer 482 



Gastro-Ccelomic Cavity 485 



Synapticula , 487 



Columella 490 



Order of appearance of Septa 490 



Protosepta 490 



Metasepta 493 



Asexual reproduction 495 



Budding in Madrepora 497 



Budding in Solenmtrxn 499 



Budding in Claducora 501 



Fission in Mmikina 502 



Fission in Fai'ia 508 



Fission in Porites 513 



Fission in Madrepora 515 



401 



