LIST OF ILLUSTRATIONS xiii 



FIG. PAGE 



77. THREAD CELLS OP A CCELENTEBATE, MAGNIFIED . . . 127 



78. THE SQUIBBEL'S-TAIL SEA FIB (Sertularia argentea), WITH A POR- 



TION ENLARGED ........ 128 



79. Sertularia filicula . . . . . . . 129 



80. cupressina . . . . , . . 130 



81. THE HERRING-BONE POLYPE (Halecium halecinum) . . 131 



82. Tubularia indivisa . . . . . . 132 



83. THE BOTTLE BRUSH (Thuiaria thuja) . . . ,132 



84. Antennularia antennia . . . . . . 133 



85. Aurelia aurita ........ 135 



86. THE EARLY STAGES OF Aurelia . . . . . . 136 



87. Bhizostoma .... ... 136 



88. Chrysaora . . . , . , . , 136 



89. Cydippe pileus ........ 137 



90. SECTION OF AN ANEMONE . . . . . . 139 



91. STINGING CELLS OF ANEMONE, HIGHLY MAGNIFIED . . . 140 



92. DIAGRAMMATIC TBANSVEBSE SECTION OF AN ANEMONE . . . 140 



93. LARVA OF ANEMONE ....... 140 



94. THE TRUMPET ANEMONE (Aiptasia Couchii), CORNWALL ; DEEP 



WATER ......... 144 



95. Peachia hastata, S. DEVON ...... 145 



96. Sagartia pallida, DEVON AND CORNWALL . . . 146 



97. Sagartia nivea, DEVON AND CORNWALL . 147 



98. Oorynactus viridis, DEVON AND CORNWALL . . . . 148 



99. Bunodes thallia, WEST COAST ..... 150 



100. Bunodes gemmacea, WITH TENTACLES RETRACTED . . . 151 



101. Caryophyllia cyathus ....... 152 



102. Sagartia parasitica . . . . . . . 153 



103. THE CLOAK ANEMONE (Adamsia palliata) ON A WHELK SHELL, 



WITH HERMIT CRAB ....... 154 



104. LARVA OF THE BRITTLE STABFISH . . . . . 158 



105. LABVA OF THE FEATHEB STAR ..... 160 



106. THE ROSY FEATHER STAB . . . . . . 160 



107. THE COMMON BRITTLE STAB ...... 162 



108. SECTION OF THE SPINE OF A SEA UBCHIN . . . . 165 



109. SEA UBCHIN WITH SPINES REMOVED ON ONE SIDE . . 166 



110. APEX OF SHELL OF SEA UBCHIN . . . . 166 



111. SHELL OF SEA UBCHIN WITH TEETH PBOTBUDING . . . 167 



112. INTEBIOB OF SHELL OF SEA UBCHIN . . . . 167 



113. MASTICATORY APPABATUS OF SEA UBCHIN .... 167 



114. SEA UBCHIN DISSECTED, SHOWING THE DIGESTIVE TUBE . . 168 



115. THE SEA CUCUMBEB ....... 170 



116. A TURBELLABIAN, MAGNIFIED . . . . . . 175 



117. Arenicola piscatorum . ...... 178 



118. THE SEA MOUSE . . . . . . . . 179 



119. TUBE-BUILDING WOBMS: Terebella, Serpula, Sabella . . 182 



