INDEX. 



425 



Thread capsules, are they organs of 



urtioation, 154 et seq. 

 Todd, Dr, on interruiited continuity of 



nerve-fibre and its effects, 395. 

 Trawling, description of, 293. 

 Trembley on the fresh-water Polj^pes, 



144 — exi^erinient on the Hydra by, 



230 note — on the reproduction of the 



Polype, 299. 

 Tresco, climate of, 243. 

 Triton, irritability of the, after death, 



350 — its nervous system, 394. 

 Troglodytes, haunts of the, 17 — not 



migratory, 132. 

 Tubicolffi, gemmation among the, 65. 

 Tubularia parasitica, 354. 

 Typical forms, interest of, 36. 



Urticating cells, the alleged, in the 

 Polypes, 154 et seq. 



Valleys, want of, at Ilfracombe, 6. 



Van Beneden, name given to Parthe- 

 nogenesis by, 298 — his views on it, 

 306. 



Vegetable and Animal life, the mode of 

 distinguishing between, 127 et seq. 

 See Plants. 



Venus flytrap, see Dionsea Muscipula. 



Vision, the process of, 360 et seq. 



Vitality, peculiarities of, 59. 



Vivisection, defence of, 347. 



Von Baer, his law of animal develop- 

 ment, 167. 



Von Siebold on the Eolis, 116 — on the 

 Annelids, 117 — on the paralysing 

 power of the Hydra, 142 — classifica- 

 tion of the Sagittaby, 265 — views of, 

 on Parthenogenesis, 306, 322 — on the 



eye of Invertebrates, 369 — on the 

 colour of the ganglia of the Doris, 

 &c., 890. 

 Vorticellse, the parasitic, 56. 



"Wagner on the sex of the Actiniae, 

 173. 



Water, entrance of, into the blood, 116. 



Water-newt or Triton, see Triton. 



Whelk, the, and the Hermit crab, 53. 



Wild-flowers, varieties of, in Scillv, 

 200. 



Will, ready ascription of, by zoologists, 

 to the lower animals, 100. 



Williams, Dr T., on the Annelids, 67 

 et seq. — his views on the chylaqueous 

 fluid, 71 — on the tentacles of the 

 Annelids, 72 et seq. — definition of a 

 nutritive fluid by, 269 — on that of 

 the Anemone, 271, 273. 



Wolff on the flower and fruit, 324, 327. 



Wollaston, Mr, on the vitality of Mol- 

 luscs, 358. 



Woodward, Mr, on the Molluscs, 357. 



Worms, see Annelids. 



Wright, Dr Strethill, on the dianthus, 

 178 — the Actinia ornata described by, 

 292. 



Yeast, reproduction in, 333. 



Zoologists, inattention to logic among, 



102, 104 — increasing enthusiasm of 



the, 188. 

 Zoolog5% necessity of scepticism in, 162 



— danger of a priori conclusions in, 



387 et seq. 

 Zoophytes, partiality of for darkness, 



99. 



