CONTENTS. XV 



PAGE 



Entozoic Worms Part 6 898 



Nervous System of Trematodes » 898 



Bhabdocoela from the Depths of the Lake of Geneva .. .. „ 898 



Physiology of a Green Planarian „ 899 



Worthington Smith on Diseases of Field and Garden Crops „ 935 



Echinodermata. 



Histology of Echinodermata Part 1 60 



Nervms System of Holothurians „ 62 



Vascular System of Echinoderms ,, 63 



Echinoderm Morphology Part 3 389 



Development of Comatula „ 389 



Pharynx of an unknown Holothurian „ 390 



Nervous System of the Crinoidea „ 501 



Development of the Germinal Layers of Echinoderms .. .. Part 4 573 



New Genus of Echinoids ?> 574 



Bevision of the Genus Oreaster >, 574 



Organization of Adult Comatulidce v ^75 



Constitution of Echinoderms Part 5 750 



Pourtalesia » 751 



Anatomy of Larval ComatulcB m '754 



Notes on the Structural Characters of the Spines of 



Echinoidea. {Cidaridce.) {Plate XIII !) Part 6 846 



Structure of Echinoderms » 900 



Nervous System of Antedon rosaceus „ 901 



Nervous System of Crinoidea » 902 



Asteroidea of the Norwegian North Sea Expedition .. .. „ 903 



Mimaster, a new Asterid u 903 



Amphicyclus, a new Holothurian „ 903 



Cuvierian Organs of the Cotton-spinner „ 904 



Coeleuterata. 



Commensalism betvxen a Fish and a Medusa Part 1 35 



Nervous System of Porpita » 64 



Bermudan Medusa d 65 



Commensalism between a Fish and a Medusa Part 2 204 



Annelid Commensal with a Coral , 204 



New Alcyonarians, Gorgonids, and Pennatulids of the 



Norwegian Seas » 2o9 



Origin of Coral Beefs »> 240 



PorpitidcB and Velellidce >. 241 



Mesenterial Filaments of Alcyonaria Part 3 390 



Anatomy of Peachia hastata » 391 



Ephyroe of Cotylorhiza and Bhizostoma « 391 



Anatomy of Campanularidce Part 4 575 



Structure of the Velellidce » ^76 



ActinicB of the Bay of Naples » 577 



Notes on Medusce Part 5 755 



Bevision of the Madreporaria ?> 755 



