xxii LIST OF ILLUSTRATIONS 



FIG. PACK 



129. Aurelia aurita, development 174 



130. Tessera princeps . 178 



131. Lucernaria 178 



132. Pericolpa quadrigata 179 



133. Nausithoe 180 



134. Charybdsea marsupialis . . • 181 



135. Pilema pulmo "... 183 



136. Pelagia noctiluca, development 184 



137. Tealia crassicornis, dissection and transverse section . . .186 



138. Diagrammatic sections of Sea-anemone 188 



139. Tealia crassicornis, section of tentacle 190 



140. Nematocysts of Sagartia 190 



141. Section of mesenteric filament of Sagartia .... . 191 



142. Transverse sections of embryos of Actinia 193 



143. Zoanthus sociatus 197 



144. Hartea elegans 197 



145. Corallium rubrum 198 



146. Astrsea pallida .. . 198 



147. Pennatula sulcata - . 199 



148. Tubipora musica 199 



149. Edwardsia claparedii 200 



150. Antipathes ternatensis 201 



151. Parantipathes and Schizopathes 202 



152. Minyas 202 



153. Alcyonium palmatum 203 



154. Gorgonia verrucosa ..... 204 



155. Structure of simple coral . . 206 



156. Dendrophyllia and Madrepora 207 



157. Adamsia palliata 209 



158. Hormiphora plumosa , 211 



159. ,, ,, dissection and transverse section . . . 212 



160. ,, ,, diagrammatic sections 214 



161. ,, ,, section of branch of tentacle .... 215 



162. , , , , sense-organ 216 



163. Ovum of Lampetia 217 



164. Segmentation of oosperm in Ctenophora 218 



165. Development of Ctenophora 218 



166. Development of Callianira 218 



167. ,, ,, (later stages) ...... 219 



168. Three Cydippida 222 



169. Deiopea kaloknenota 223 



170. Cestus veneris . . 223 



171. Beroe forskalii 224 



172. Ctenoplana kowalevskii 225 



173. Sections of embryos of Actinia and Beroe 228 



174. Diagram illustrating the mutual relationships of the Ccelenterata . 229 



175. Dicyema paradoxum with infusoriform embryos . 230 



176. ,, ,, „ vermiform ,, .... 230 



