X LIST OF PLATES. 



?IG. PAGE 



147. Fang of spider . .188 



148. Garden spider 189 



149. Spinning apparatus of the spider . . . . .190 



150. Trap-door spider . . . ... .191. 



151. Nest of trap-door spider . . . . . . 192 



152. Trap-door opening by a lever . .... 192 



153. Section of nest 192 



154. The eyes of spider 



155. Nest of house-spider ....... 195 



156. Foot of spider 196 



157. Crab covered with oysters ...... 204 



158. Common lobster 205 



159. Young of crab 209 



160. First stage of shore-crab ...... 210 



161. Second stage of shore-crab . . . . . .211 



162. Third stage of shore-crab . . .. . . .212 



163. Soldier-crab occupying an empty shell . . . .214 



164. Soldier-crab removed from its shell .... 215 



165. Mantis shrimp 217 



166. Opossum shrimp . . . . . . 218 



167. Talitrus the sand-hopper . . . . . .219 



168. Caprella 220 



169. Limnoria terebrans ....... 221 



170. Water-fleas 223 



171. Marine entomostraca 223 



172. Fairy shrimp 225 



173. King crab 226 



174. Pycnogon . . . . . . . .228 



175. Lernean . . . . . . . . .228 



176. Skeleton wheel-bearer 230 



177. Kotifera . . . ... . . .231 



178. Brachionus . .232 



179. Cirri of barnacle 235 



180. Young of barnacle 236 



181. Barnacles . 237 



182. Acorn-shells on the shell of a whelk .... 238 



183. Flustrafoliacea . . 243 



184. Cells of flustra magnified 244 



185. Bowerbankia . . . . . . . .245 



186. Cellularia avicularia 247 



187. Plumatella 



188. External form of ascidia ...... 249 



189. Diagram of structure of ascidian ..... 250 



190. Salpa maxima . . . . . . . 251 



191. Pyrosoma .... , 253 



1 92. Compound ascidian starry botryllus .... 254 



193. Scallop . . . . . . . . . 255 



194. Venus chione . 256 



195. Spined venus .257 



196. Lima . .260 



197. Great scallop . . . 261 



198. Animal of mussel . . . . . . .262 



199. Pinna 263 



200. Mussels . . .264 



