INDEX. 



Abranchiate, the Eolis an, 112. 



AcalepliBe, entrance of water into the 

 blood in, 117. 



Acanthias, no fibres in the brain of the, 

 394. 



Actaeon, the, 216, 255 — ^peculiarity of 

 the ova of, 260 note. 



Actinia, the finding of the first, 13, 14 — 

 vitality of separated filaments of the, 

 60 — name of, first adopted, 124 — lon- 

 gevity of, 146 note — anatomy, 164. 

 See also Anemone. 



Actiniae, the, 13 — ;iars suitable for, 35 — 

 entrance of water into the blood in, 

 116 — how their animal nature is de- 

 termined, 127 etseq. — viviparous, 148 

 — reproduction among them, 163 et 

 seq. — their organisation, 167 — are 

 they of separate sexes? 172 — their 

 so-called digestion or assimilation, 

 226 et seq. — species of, found at 

 Seill}', 242 — effects of light on them, 

 244 — their circulating fluid, 269 — 

 destitute both of blood and of chyl- 

 aqueous fluid, 270. 



Actinophrys, assimilation in the, 220, 

 230. 



iEschylus on the Sea, 285. 



Aeration, mode of, in Annelids, 72 — 

 process of, in the Eolis, 113. 



Agassiz on the Mactra, &c., 117 — on 

 the identity of the Medusa and the 

 Polype, 339. 



Age, effect of, on the brain tissue, 400. 



Alcyonidium hirsutum, the, 354. 



Alder and Hancock's Nudibrauchiate 

 MoUusca, 36 — on the Pholas, 91 



- note. — their representations of the 

 Eolids, 109 — on the Doris, 112— on 

 the respiration of the Eolis, 114. 



Allmann, Professor, on the circulat- 

 ing fluid of the Polyzoa, 275— his 

 monograph on Polyzoa, 354. 



Alternation of generations, 297. See 

 Parthenogenesis. 



Ammocete, metamorphosis of the, 253 

 note. 



Amoeba, constitution, &c. of the, 167 

 — organisation of the, 220 note — di- 

 gestion iu it, 230, 



Anemone, how determined to be an 

 animal, 127 et seq. — voracity of the 

 133 — its alleged paralysing power, 

 135 — its reproductive system, 163 — 

 its structure, 164. See also Ac- 

 tinia. 



Aurora, the, 83 — its vitality, 21 



— identical with Venusta, 150. 



bellis, 14 — where found, 17 — 



trial of its paralysing power, &c., 

 138 — its tentacles, 165 — effects of 

 light on it, 244 — nutriment derived 

 from water by it, 271 — observations 

 on the supposed chyle-corpuscles in 

 it, 274. 



crassicomis, where found, 17 



— chiselling it out, 19 — its voracity, 

 134— trial of its paralysing power, 

 138, 140 — the thread capsules in it, 

 157 — discovery of the ovaries in it, 

 170— at the Scilly Isles, 212— expe- 

 riments on its supposed solvent 

 fluid, 227 — varieties of it, 253 — varia- 

 tions in size in it, 270. 



depressa, 129. 



dianthus or Plumose, 129, 178 



— the thread capsules in it, 158- 

 experiment on its urticating power, 

 160 — Dr Wright on it, 178 — reproduc- 

 tion in it, 180. 



lacerata. reproduction in, 180, 



182. 



nivea, 253. 



ornata, 292. 



parasitica, oviparous, 149 — at 



Jersey, 292. 



rosea, reproduction in the, 180. 



venusta, 83 — its vitality, 21 — 



and aurora, identity of, 150. 

 Anemones, impoi-tance of leaving their 

 base uninjured, 20 et seq. — transmis- 

 sion of, by post, 82 — general enthu- 

 siasm for them, 121 — errors in books 

 regarding them, 123 et seq. — their 

 stinging power, 145 — disproof of 

 their alleged paralysing power, 146 

 their longevity and vitality ib.— edi- 

 ble, 147 — vi\iparous, 148 — uncer- 

 tainty of colour as a distinction in 

 them, 150 — the so-called ui'ticatiug 



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