INDEX. 



511 



Olisthops, description of the genus, 

 290. 



Omalocepliala, new species of, 208. 



Onygena, new species of, 184. 



Oomyces, description of the new ge- 

 nus, 185. 



Orthoceras, new species of, 46. 



Owen, Prof., on the gigantic wingless 

 birds of New Zealand, 229. 



Pagurus, new British species of, 320. 



Panopaja, new species of, 60. 



Parrots, on the Trichoglossine genus 

 of, 148. 



Patellaria, new species of, 184. 



Paussida;, new species of, 491. 



Paxillus, description of the new ge- 

 nus, 63. 



Peziza, new species of, 179. 



PfeifFer, Dr. L., on a new Pupina and 

 two new Helicinas, 492. 



Philodromus, on the British species 

 of, 451. 



Phragmoceras, new species of, 45. 



Piggotia, description of the genus, 95. 



Planorbis, new species of, 67. 



Plants, localities for rare British, 75, 

 154 ; on the distribution of British 

 marine, 232; on the presence of 

 fluorine in, 266 ; on the analogy be- 

 tween the mode of reproduction in, 

 and the alternation of generations 

 observed in some Radiata, 348. 



Polyzoa, on three imdescribed species 

 of, 81. 



Poitunus, new British species of, 321 . 



Potamohius serratus, observations on, 

 421. 



Poterioceras, new species of, 45. 



Presbytis, new species of, 338. 



Prestvvich's Geological Inquiry re- 

 specting the Water-bearing Strata 

 of the country aroimd London, re- 

 viewed, 486. 



Prionacalus, new species of, 70. 



Psittacodis, new species of, 148. 



Psittacus, new species of, 148. 



Pterinea, new species of, 60. 



Pteroceras, on a new species of, 306. 



Pteronites, new species of, 170. 



Pulmonifera, on the dentition of Bri- 

 tish, 86. 



Punica, on the structure of the fruit 

 in, 488. 



Pupina, description of a new, 492. 



Pusionella, on the characters of the 

 genus, 337. 



Pycnoptilus, characters of the genus, 

 342. 



Pjnrodes, new species of, 71. 



Rain-drops, on fossil, 237. 



Realia, new species of, 67- 



Reeve, L., on the geographical distri- 

 bution of the Bulimi, 241 ; on a new 

 species of Lymnsea, 331. 



Rhuiotrichum, new species of, 177. 



Rhopalomyces, new species of, 96. 



Richardson, Sir J., on Australian fish, 

 273. 



Ritchie's A. T., Dynamical Theory of 

 the Earth, reviewed, 134. 



Rotifera, on various species of, 424. 



Rottler, Rev. Dr., biographical notice 

 of the, 343. 



Royal Institution, j)roceedings of the, 

 232. 



Rubus, on a supposed new species of, 

 374. 



Salticus, on the British species of, 

 400, 446. 



Sanguinolaria, new species of, 69. 



Sanguinolites, new species of, 66, 172. 



Saxifraga Hirculus, new station for, 

 75. 



Schizaster, new species of, 133. 



Schlegel, Dr. H., on a new genus of 

 Batrachians, 70. 



Sciaphila, characters of the genus, 

 323. 



Scrupocellaria, new species of, 83. 



Separatista, monograph of, 228. 



Sericophorus, new species of, 32. 



Shark, on the natm-al history of the, 

 353. 



Shark-fishing at Kurrachee, observa- 

 tions on, 493. 



Shells, new, 27, 63, 64, 69, 103, 129, 

 138, 146, 218, 262, 331, 335, 377, 

 420, 492 ; of Ceylon, hst of the 

 land and fi-eshwater, 408. 



SherwrU, Capt. W. S., on the bird- 

 devouring habit of a species of 

 spider, 427. 



Siebold, Prof. T. von, on the conjuga- 

 tion of Diplozoon paradoxum, 428. 



Simmonds, P. L., on the resuscitation 

 of frozen fish, 76. 



Smith, F., on some new species of 

 exotic Hymenoptera, 28. 



Smith, J. P. G., on Callichthys and 

 Anableps, 350. 



Smith, Rev. W., on Diatomaceae, with 

 descriptions of British species of 



