xx LIST OF ILLUSTRATIONS 



Kl<;. PAOE 



134. Pennatula sulcata 186 



135. Tubipora niusica 186 



13(5. Edwardsia claparedii 187 



137. Cirripathes anguina 188 



138. Fenja mirabilis .189 



130. Minyas .189 



140. Alcyonium palniatum . , 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 . . . 19'.) 



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 



ir>6. Deiopea kaloknenota 210 



157. Cestus veneris 210 



158. Beroe forskalii - . . .211 



l.V.. Ctenoplana kowalevskii 212 



160. Sections of embryos of Actinia and Beroe 214 



161. Diagram illustrating the mutual relationships of the Coelenterata . 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 adluerens . . . . . ... . . 220 



171. Planaria, digestive and excretory systems 223 



172. ,, nervous system . - 223 



173. ,, reproductive system 225 



174. Transverse section of a Planarian 226 



175. Distoinum hepaticum . . 226 



176- ,, section of integument 227 



177. internal organisation 228 



terminal part of reproductive apparatus . 229 

 development . . - 230 



180. Ta-nia soliiun .... 232 



181. ,, ,, head . . . 233 



182. ,, ,, transverse section 233 



