INDEX. 



405 



Digcnosis, 281. Sc^ Parthenogenesis. 



Digestion, organs of, in the Eolis, 104 — 

 what constitutos it, "207 — distinction 

 between it and assimilation, 208 — 

 simplest form of, 209 — its successive 

 forms, ib. d serj. — is mainly chemical, 

 211 — what is included in it, 212 — a 

 special function, 213 — experiments on 

 the so-called, in the Actini;c, 214 el 

 ."67. — advance of, in the animal series, 

 227 — assimilation not identical with 

 it, 394. 



Diona,'a muscipula, an example of a food- 

 seizing plant, 123. 



Dissections, how done, &c., 273. 



Dog, the new-born, peculiarity in nerv- 

 ous system of the, 376". 



Dog-fish, the nervous system of the, 

 376. 



Dorids at Jersey, 275. 



Doris, the, 44 — the spawn of the, 23 — 

 respiration in it, 106 — peculiarity of 

 structure in foot of, 110 — its develop- 

 ment, 245 — the shell rudiment in it, 

 247 — the so-called eyes in it, 341 — 

 hearing in, 354 — its nervous system, 

 371, 373, 374. 



lugubris, peculiarity of the eyes 



in the,l342. 



tuberculata, the, 242. 



Dragonfly, nerve-tissue of the larva of 

 the, 386. 



Drajier, Professor, on animal develop- 

 ment, 157— on the influence of light 

 on plants, 232 — liis theory of vision, 

 347 et seij. 



Dredging for marine animals, 88. 



Dress, appropiriatc, for marine collect- 

 ing, 17. 



Druidical remains, supposed, in the 

 Scilly Isles, 221. 



Eating, defence of, 41. 



Echinoderms, the, 240. 



Ecker on the so-called muscles of the 

 Hydra, 389. 



Edwards, see Milne Edwards. 



Ehrenberg, the Polygastrica of, 217 

 7iote, 



Elizabeth, Queen, fortification of the 

 Scilly Isles by, 193. 



Englishmen, characteristics of, abroad, 

 28 — i)assion of, for the sea, 198. 



Entomostraca, peculiarities of genera- 

 tion in the, 290. 



Entozoa, alternation of generations 

 among the, 287. 



Envelope, importance of the, in ani- 

 mals, 157. 



Enveloping membrane, supposed, in 

 the Actinophrys, 208. 



Eolids, investigations into the respira- 

 tion of the, 101 — the thread capsules 

 in the, 146, 148 — their development, 

 245- at Jei-sey, 275. 



Eolis, the, 25 — description of it, 103 — 

 dissection of it, ib. 104 — its respira- 

 tion, 106 — not a Niulibranchiate, 

 107, 109— Owen and Siebold on it, 

 110— the shell rudiment in it, 247— 

 the so-called eyes in it, 341. 



alba, the, 204, 242. 



landsbergii, 103. 



papulosa, 103, 242. 



pellucida or elegans, 103. 



Eunice, peculiarity in the. 111. 



Eye, alleged injury from the micro- 

 scope to the, 37 — a tactile organ, 343 

 et seq. 



Eyes, the so-called, in MoUuscs, 341. 



Ferussac, Baron, on the insensibihty 



of the lower animals, 331. 

 Filifcrous capsules, see Thread capsules. 

 Fish, paradoxes and anomalies among, 



236 et seq. 

 Fishes, eccentricities of, 51. 

 Fishermen, value of, to^ the marine 



hunter, 272 — their stupidity, 273. 

 Fissiparous reproduction, what, 308. 

 Fleming, Professor, 139 note. 

 Flourens, M., on the gills offish, 338. 

 Food, relations of life to, 21 fl — parallel 



between, and knowledge, 219. 

 Forbes's Naked-eyed Medusse and 



British Star-fishes, 34 — on the Cri- 



noidoa, 205 — on the Brittle-star, 241 



— on the Solen, 365. 

 Fresh-water Polj-pes, Trembley on the 



reproduction of the, 282. 

 Frog, the nervous system in the young, 



375. 

 Function, relations between organ and, 



59, 393 et seq. 

 Eunice on the nervous system, 388. 



Gall-flt, peculiarity of sex in the, 291 . 



Ganglia, the, of the Doris, &c., 371 elseq. 



Gem, the, 21, 24. 



Gemmacea;, haunts of the, 16 — not 

 migi'atorj', 125 — variations in size in 

 the, 255. 



Gemmation or budding of Annelids, 

 the, 61 — reproduction by, 282 — iden- 

 tity of, with generation, 308. 



Gommiparous generation, what, 308. 



Geneageuesis, 281. See Parthenoge- 

 nesis. 



