INDEX. 



423 



Pagurus, or Hennit crab, habits, &c. 

 of the, 49 et seq. 



Pain, is it felt by the Medusae? 347 et 

 seq. — the manifestations of, in man, 

 and error in transferring these to tlie 

 lower animals, 348 — shrinking, cries, 

 &c., not necessarily signs of, 349 — 

 its connection with the nervous 

 system, 350 — sensibility to, a special- 

 isation of the general sensibility, 351 

 — ditterences of it, 352. 



Paramecium, rapidity of increase of 

 the, 332. 



Parthenogenesis, what, 297 et seq. — 

 history of its discovery, &c., 298 et 

 seq. — statement of, 309 — new facts in 

 it, 310 et seq. — theories of, 317 — 

 author's theory of, 338 et seq. 



Pedicellaria of the Starfish, the, 387. 



Pedicellina, the, 263 — is viviparous as 

 well as oviparous, (fee, 264. 



Peltier, M., observations of, on Anne- 

 lids, 66. 



Penzance lodging-house, a, 193. 



Perch, sexual peculiarity of the, 177. 



Percha scandens, the, 252. 



Pholas dactylus, the, 85, 87, 90. 



Phosphorescence of the sea, source of 

 the, 344, 345. 



Phyllirhoe, granular nerves in the, 397. 



Physalia, peculiarities of the, 55. 



Pipefish, the, 215 — its nervous sys- 

 tem, 394. See Sjnignathus. 



Planaripe, the, 112 — the thread capsules 

 in, 154, 156. 



Plants, sensitive to light, 128 — exam- 

 ples of their seizhig insect-food, 130 

 — locomotion in, 131 — relations of 

 light to, 24:6 et seq. — Parthenogenesis 

 among, 308. 



Pleurobranchsea, the, 372. 



Pleurobranchus, the, 256 — its digestive 

 organs, 257 — the shell rudiment in, 

 261 — the so-called eyes in, 359 — 

 hearing in, 372 — its nervous system, 

 390, 393. 



Plumatella, the, 215. 



Plumose Aiiemone, see Anemone Di- 

 anthus. 



Plumularia myriophyllum, Partheno- 

 genesis in the, Sll, 313. 



Piumularian Polypes, Parthenogenesis 

 among, 311. 



Poets, the, on the sea, 285. 



Polygastrica of Ehrenberg, the, 230 

 note. 



Polynoe, blood of the, 70. 



Polyi^es, the alleged paralysing power 

 of the, 135 — the thread capsules in 

 the, 154, 156 — do they truly digest, 

 226--digestion in, 230 — peculiar re- 

 jiroduction in, 297 — production of 

 jelly-fish by, ih. etseq. — Parthenoge- 

 nesis among, 308 — identity of, and 

 the Medusa, 339 — sensibility mani- 

 fested by, 404. 



Polypes, the fresh-water, their para- 



lysing power disproved, 145 — herma- 

 phrodite, 177. 

 Polypus eudendrium, jieculiarities of 



generation in, 313. 

 Polyzoa, the, 215 — Allmann on the 



fluids of the, 275 — molluscan nature 



of, 354. 

 Polyzoon, a new, 354. 

 Pond, a, 74. 

 Pond-mussels and snails, vitality of 



the, 358. 

 Post, live animals sent by, 82. 

 Pratt, Mrs, on the stinging power of 



the Anemone, 136. 

 Priestley, discovery of the expiration 



of oxygen by plants, by, 245. 

 Protococcus nivalis, reproduction in 



the, 332. 

 Protoplasma, the, 331. 

 Public whipping in Jersey, 287. 

 Pycnogonidifi, the, 112. 



QxTATREFAGES, M., and the microscope, 

 38 — on the Annelids, 117, 118 — name 

 given to Parthenogenesis by, 298 — • 

 his views on it, 306, 322 et seq. — on 

 Owen's theory of it, 322 — on gemma- 

 tion, 329 — on the Noctilucte, 344. 



Rapp, his work on the Anemones, 125 

 — on the sensibility of the Anemones 

 to light, 129 — on the sex of the Ac- 

 tinia;, 173, 174. 



Ratiike on the Annelids, 117. 



Razor-fish or Soleu, the, 380 et seq. 

 — See Solen. 



Reaumur on the Anemones, 124 — on 

 the motion of the Anemones, 132 — ■ 

 the experiments of, on digestion, 228. 



Red Nose, the, 87. 



Rejiroduction as a life-function, 61, 62, 

 — by gemmation, on, 64 — system of, 

 in the Anemone, 163 — recognised 

 forms of, 326 — and grovvth, essential 

 identity of, 331 — processes of, by di- 

 vision of cells, 332 et seq. — ^by union 

 of two similar cells, 334 — by that of 

 two dissimilar cells, ib. 



Respiration, twofold, in Annelids, 72 

 — of the Eolids, investigation into 

 the, 107, 111 et seq. — infiuence of 

 light on, 248 — relations of, to circula- 

 tion, 268 — specialisation of, 406. 



Retina, error as to images being form- 

 ed on the, 361 — its structure, 362 — 

 insensible to light, 364 — its position 

 in Invertebrates, 368. 



Ribbon-fish, the, 25, 215. 



Robin on the colour-specs of the Loli- 

 go, 102 note. 



Rocks, the, at Ilfracombe, 9. 



Rock-basins, the supposed Druidical, 

 235. 



Rondelet on the Anemones, 124. 



Sabell^, the, 69— blood of the, 70. 

 Sagartia, proposed new genus of, 158. 



