xiv CONTENTS. 



Emhryogcny of Asteriscus vcrruculatus No. 4 428 



On the Skeleton of the Asteriadce „ 428 



" Comet-forms " of Starfishes No. 5 576 



Genital Organs of Asterina gibhosa „ 579 



Anatomy of Brisinga „ 579 



Aspidura „ 581 



Anatomy of the Ophiurida No. 6 737 



Aspidura ,, 738 



Comatulce of the ' Challenger ' Expedition „ 739 



New Organs of the CidaridcB .. .. No. 7 888 



Echini of the ' Challenger ' „ 889 



Anal Plates of Echinocidaris „ 890 



Ccelenterata. 



Origin of the Sexual Products in Ilydroids No. 1 66 



New Anthozoa „ 87 



Parasitism of a Coral on a Sponge „ 96 



J7ie Locomotor System of Medusce No. 2 171 



Tetrapteron volitans „ 172 



Deep-sea Siphonophora No. 3 278 



Strange Anomaly among the Hydromedxisoi „ 278 



Muscle-epithelium in Anthozoa ,, 279 



Phylogeny of the Antipatharia „ 279 



Skeleton of the Alcyonaria „ 279 



New Species of Isis „ 281 



Gorgonia verrucosa „ 281 



Prehensive Cells in the Ctenophora „ 282 



Australian Corals „ 282 



New Genus of Millcporida: „ 283 



Researches into the Hydrozoa No. 4 430 



Spongicola fstidar is, a I/ydroid inhabiting Sponges ., .. „ 431 



Deep-sea Siphonophora „ 432 



Histological Characters and Development of Myriothela , . „ 432 



Classification and Phylogeny of Actinozoa No. 5 581 



Neio Paludicolous Medusa „ 582 



Charybdea marsupialis „ 583 



Halistemma tcrgestinum „ 584 



Tubularia mesembryanthemum „ 585 



New Genera and Species of Corals No. 6 741 



Ctenophora of the Gulf of Naples „ 742 



Phylogeny of the Ctenophora No. 7 890 



Zoantharia malacodermata of the Coasts of Marseilles . . ,, 892 



Blastology of the Corals „ 892 



Porifera. 



The Fibrilla: of Filifera No. 1 49 



Sperm-formation in Spongilla „ 73 



Borings of a Sponge in Marble „ 82 



Parasitism of a Coral on a S^oonge „ 96 



Development of Spongilla fluviatilis No. 2 174 



Morphology and Systematic Position of the Spongida ., „ 177 



