X LIST OF PLATES 



FIG. 



147. Fang of spider . 



148. Garden sj^ider . 



149. Spinning apparatus of the spider 



150. Trap-door spider 



151. Xest of trap-door spider 



152. Trap-door opening by a lever 

 15.3. Section of nest . 



154. Tlie eyes of spider 



155. Nest of house-spider . 



156. Foot of spider . 



157. Crab covered with oysters 



158. Common lobster 



159. Young of crab . 



160. First stage of shore-crab 



161. Second stage of shore-crab 



162. Thhd stage of shore-crab 



163. Soklier-crab occupying an empty sliell 



164. Soldier-crab removed from its shell 



165. Mantis shrimp . 



166. Opossum shrimp 



167. Talitrus— the sand-hopper 



168. Caprella . 



169. Limnoria terebrans . 



170. Water-fleas 



171. Marine entomostraca . 



172. Fairy shrimp 



173. King crab 



174. Pycnogon 



175. Lernean . 



176. Skeleton wheel-bearer 



177. Kotifera . 



178. Brachionus 



179. Cirri of barnacle 



180. Young of bamacle 



181. Barnacles . 



182. Acorn-shells on the shell of a whelk 



183. Flustrafoliacea. 



184. Cells of flustra magnified 



185. Bowerbankia 



186. Cellularia avicularia . 



187. Plumatella 



188. External form of ascidia 



189. Diagram of structure of ascidian 



190. Salpa maxima . 



191. Pyrosoma . 



192. Compound ascidian— stari-y botryllus 



193. Scallop . 



194. Venus chione 



195. Spined venus . 



196. Lima 



197. Great scalloiJ 



198. Animal of mussel 



199. Pinna 



200. Mussels . 



