xx LIST OF ILLUSTRATIONS 



Fid. PACE 



134. Pennatula sulcata . . 186 



135. Tubipora musica. . . . . . 186 



136. Edwardsia claparedii 187 



137. Cirripathes anguina . . 188 



138. Fenja mirabilis . .189 



139. Minyas . 189 



140. Alcyonium palmatum ... .... 190 



141. Gorgonia verrucosa . 191 



142. Structure of simple coral .... 193 



143. Dendrophyllia and Madrepora . ...... 194 



144. Adamsia palliata . . ...... 196 



145. Hormiphora plumosa 198 



146. ,, ,, dissection and transverse section . . .199 



147. ,, ,, diagrammatic sections 201 



148. , , , , section of branch of tentacle .... 202 



149. ,, ,, sense-organ . . . ... 203 



150. Ovum of Lampetia . . . 204 



151. Segmentation of oosperm in Ctenophora . . . 204 



152. Development of Ctenophora . . . . .205 



153. Development of Callianira ... . 206 



154. ,, ,, (later stages) . . 206 



155. Three Cydippida . 209 



156. Deiopea kalokiienota . . . . . 210 



157. Cestus veneris . ... 210 



158. Beroe forskalii . . 211 



159. Ctenoplana kowalevskii ... 212 



160. Sections of embryos of Actinia and Beroe 214 



161. Diagram illustrating the mutual relationships of the Coalenterata . 215 



162. Dicyema paradoxum with infusoriform embryos .... 217 



163. ,, ,, ,, vermiform ,, ... 217 



164. ,, ,, embryo . .... 218 



165. Rhopalura giardii, male . . ... 218 



166. ,, ,, female . . 218 



167. ,, ,, development . . ... '-. 219 



168. Salinella, longitudinal section ... . 219 



169. ,, transverse ,, . ... 219 



170. Trichoplax adhjerens . 220 



171. Planaria, digestive and excretory systems . ... 223 



172. ,, nervous system ... 223 



173. ,, reproductive system . ... . . 225 



174. Transverse section of a Planarian . .... 226 



175. Distomum hepaticum ... . 226 



176. ,, ,, section of integument . ... 227 



177. ,, ,, internal organisation 228 



178. ,, ,, terminal part of reproductive apparatus . 229 



179. ,, ,, development . . . 230 



180. Tamia solium ... . .232 



181. ,, head . . 233 

 1---. ,, ,, transverse section 233 



