LIST OF ILLUSTRATIONS. 



FIG. PAGE 



175. Grasshopper 264 



176. Cricket . ..... . 264 



177. Plant Lice 265 



178. Red Ants 265 



179. Aquatic Insect Larvae . . 266 



1 80. Polynema 267 



181. Campodea 269 



182. Lindia 270 



183. Gregarina and its Development . 275 



184. Different Forms of Amoebae . . 276 



185. Foraminifera 277 



1 86. Volvox and various Animalcules . 278 



187. Sponge and its Development . . 279 



188. Hydrae 280 



189. Zoophytes 281 



190. Flustra, or Sea-mat .... 284 



191. Tapeworm ...... 285 



192. Nais, or Freshwater Worm . . 286 



193. Joints of Lobster .... 286 



194. Development of Julus . . . 287 



195. Starfishes 288 



196. Plant-Lice 289 



197. Comparison of Development in a 



Flowering Plant, a Zoophyte, and 

 a Colony of Plant- Lice . . . 290 



198. White Corpuscles of the Blood . . 295 



199. Daisy 300 



200. Section of Daisy .... 301 



201. Dandelion 302 



202. Cento/urea, cyanus, or Corn Blue- 



bottle 303 



203. Head of Thistle, showing numerous 



Florets 304 



204. Simple Umbel of Cherry and Com- 



pound Umbel of Fool's Parsley . 304 



205. Wallflower . . .... 309 



206. Foxglove 309 



207. Snapdragon 309 



208. Primroses 310 



209. Nettle-flowers 311 



210. Female or Pistillate Flowers of Willow 311 



211. Male or Staminate Flowers of Willow 311 



212. ,, Oak . 312 



213. Pistillate Flowers of Oak . . .313 



214. Parts of a Flower (Campanula) . . 313 



215. Flower of Saxifrage in Section . . 313 



216. Stamens of Iris 314 



PAGE 



314 



314 



3*4 

 316 

 316 



FIG. 



217. Stamen of Amaryllis .... 



218. Pistil of Chinese Primrose . . ". 



219. Strawberry . . . . 



220. Pollen-grains emitting Pollen-Tubes 



221. Pollen-masses of Orchid . 



222. Pollen-grain of Evening Primrose 



(magnified) 316 



223. Pollen-grain of Melon emitting Con- 



tents 316 



224. Pollen-tubes of Datura penetrating 



the style (magnified) . . .317 



225. Section of Bean 318 



226. Fertilisation of Primrose . . . 322 



227. Arum, or Cuckoo Pint . . . 327 



228. Carnation, showing the ripe Pistil . 327 



229. Myosotis in its early and later 



stage 329 



230. Dead-nettle in Section . . . 330 



231. Flower and Stamens of Salvia . . 331 



232. Fertilisation of Salvia . . .331 



233. Section of Fuchsia .... 332 



234. Fuchsia 332 



235. Flower of Sage 333 



236. . Pea dissected . . . 333 



237. Section of Pea 333 



238. Orchid Flower ..... 336 



239. Pollen Masses of Orchid . . . 336 



240. Section of Orchid Flower . . . 336 



241. Development of Frog . . . 343 



242. Embryo-vertebrates .... 344 



243. Brachiopods 345 



244. King Crab . . 345 



245. Beryx 346 



246. Ichthyosaurus and Plesiosaurus . 346 



247. Pearly Nautilus 347 



248. Globigerina, etc 348 



249. Common Tapeworm .... 350 



250. Sacculina 351 



251. Young Sacculina .... 351 



252. Barnacles . . . . . -351 



253. Stylops 353 



254. Demodex (magnified) . . . 355 



255. Linguatulina ..... 353 



256. Sea-squirt 356 



257. Development of Sea-squirt . -357 



258. Hydrae 360 



259. Rotifera 361 



