ILLUSTRATIONS. 



FIG. PAGE 



178. Daphnia 266 



179. Bosmina 267 



180. Cypris 268 



181. Camptocercus 269 



182. Chydorus 269 



183. Alonopsis 270 



184. Diaptomus 271 



185'. Canthocamptus 271 



186. Cyclops 273 



187. Limnetis 273 



188. Artemia (a female) ... . 275 



189. Chirocephalus 276 



190. Branchipus (a male). . . 277 



FIG. PAGE 



191. A Water-mite 279 



■ 192. The Water-bear (Ma- 



crobiotus) 286 



193. Coxse of Hydrachna. . 288 



194. Coxse of Eylais 288 



195. Coxse of Arrenurus 



(female) 288 



196. Coxae of Arrenurus 



(male) 288 



197. Coxse of Atax 290 



198. Eye-plate of Limno- 



chares _. 290 



