INDEX. 



Abranchiate, the Eolis an, 107. 



Acalopliie, entrance of water into the 

 blond in. 111. 



Acanthias, no fibres in the brain of the, 

 37(5. 



Actaeon, tlie, 204, 241 — peculiarity of 

 the ova of, 246 note. 



Actinia, the finding of the first, 13 — 

 vitality of separated filaments of the, 

 57 — name of, first adopted, 118 — lon- 

 gevity of, 139 note — anatomy, 156. 

 liee also Anemone. 



Aurora, the, 79 — its vitality, 19 



— identical with Venusta, 142. 



bullis, the, 13 — where found, 



16— trial of its paralysing power, &c., 

 132 — its tentacles, l.oO — eflects of 

 light on it, 230 — nutriment derived 

 from water by it, 256 — observations 

 on the supposed chyle-corpuscles in 

 it, 259. 



crassicoiTiis, the, whore foimd. 



16 — chiselling it out, 18 — its voracity, 

 127 — trial of its paralysing power, 

 131, 133 — the thread capsules in it, 

 149 — discovery of the ovaries in it, 

 161 — at the Scilly Isles, 201 — expe- 

 riments on its supposed solvent fiuid, 

 215 — varieties of it, 239 — variations 

 in size in it, 255. 



depressa, the, 123. 



dianthus, the, 168 — the thread 



capsules in it, 149 — experiment on 

 its urticating power, 151, l.J2 — Dr 

 Wright on it, 169 — reproduction in 



it, 170. 



lacerata, reproduction in the. 



170, 172, 



nivea, 240. 



ornata, the, 276. 



parasitica, the, oviparoxis. 



141 



— at Jersey, 275. 



plumosa, the, 122. 



rosea, rejiroduction in the, 170. 



venusta, the, 79— its vitality, 



19 — and aurora, identity of, 142. 



Actinia;, the, 12 — ^jars suitable for, 33 — 

 entrance of water into the blood in, 1 1 1 

 — how their animal nature is deter- 

 mined, 120 et seq. — viviparous, 140 — 

 reproduction among them, 156 et seq. 

 — their organisation, 158 — are they of 

 separate sexes ? 1 63 — their so-called 

 digestion or assimilation, 214 et seq. 

 — species of, found at Scillj', 228 — 

 effects of light on them, 230 — their 

 circulating fluid, 255 — destitute both 

 of blood and of chylaqueous fluid, 

 256. 



Actinophrys, assimilation in the, 208, 

 217. 



Ji^schylus on the Sea, 269. 



Aeration, mode of, in Annelids, 69 — 

 process of, in the Eolis, 107. 



Agassiz on the Mactra, &c.. Ill — on 

 the identity of the Medusa and the 

 Polype, 321. 



Age, effect of, on the brain tissue, 385. 



Alcyonidium hirsutum, the, 337. 



jVlder and Hancock's Nudibranchiate 

 Mollu.«ca, 34— on the Pholas, 86 note. 

 — their re})resentations of the Eolids, 

 103 — on the Doris, 10(1 — on the re- 

 spiration of the Eolis, 108. 



Allmann, Pi-ofcssor, on the circulating 

 fluid of the Pol\-zoa, 260 — his mono- 

 f.^-aph on Polyzoa, 337. 



Alternation of generations, 281, See 

 Parthenogenesis. 



Ammocetc, metamorjjhosis of the, 239 

 note. 



Amoeba, constitution, &c. of the, 158 — 

 organisation of the, 208 note — diges- 

 tion in it, 217. 



Anemone, how determined to be an 

 animal, 120 et seq. — voracity of the, 

 127 — its alleged ])aralysing power, 

 128 — its reproductive system, 155 — 

 its stnicture, if>. 

 Anemones, importance of leaving their 

 base uninjured, 19 et seq. — transmis- 

 sion of, by post, 78 — general enthu- 



