LIST OF ILLUSTRATIONS 



182. Sepia cultrata 297 



183. Nautilus pompilius ........ 298 



184. Nautilus pompilius, section of shell ..... 299 



185. Spirula peronii ... . 301 



186. Sepia cultrata, shell ...... 301 



187. Loligo vulgaris . . .... 302 



188. Argonauta argo . . ..... 303 



189. Chromatophore of Sepia . ... 304 



190. Sepia cultrata, dissected . ... 305 



191. Nautilus pompilius, anatomy . . 306 



192. Sepia officinalis, jaws ..... 307 



193. Sepia officinalis, enteric canal . .... 307 



194. Nautilus pompilius, oral surface of male and female . . 309 



195. Balanoglossus . . 311 



196. Balanoglossus, diagrammatic sagittal section of anterior end . 312 



197. Ascidia ... ... 314 



198. Ascidia ...... ... 315 



199. Ascidia, diagram of longitudinal section . . . 317 



200. Ascidia mammillata, larva . . 320 



201. Diagram of metamorphosis of larva into fixed Ascidian 321 



202. Botryllus violaceus . . . 322 



203. Amphioxus lanceolatus, ventral and side view . 323 



204. Amphioxus, diagram of anatomy . . 325 



205. Amphioxus lanceolatus, sections .... 327 



206. Dogfish, fins, etc. . ... 329 



207. Lacerta viridis . ...... 330 



208. Lepus cuniculus, lateral viewof skeleton with outline of body . 331 



209. Scyllium, vertebrae . ..... 334 



210. Lizard, vertebrae of .... 335 



211. Lepus cuniculus . . ...... 336 



212. Scyllium canicula ... . 338 



213. Lacerta agilis, three views of skull ... . 340 



214. Fore and hind limbs of vertebrate, diagram . 341 



215. Tooth, longitudinal section, semi-diagrammatic . . 343 



216. Scyllium canicula, dissection . 345 



217. Lacerta agilis, viscera in their natural relations 348 



218. Circulation of a fish, diagram . 351 



219. Scyllium canicula, brain, dorsal view .... yc^ 



