fp' 



INDEX. 



m 



Plesiothoruipos Biuneyi, observations 

 on, 440. 



Pleurotomaria, new s})eoies of, 417. 



Plicatula, new s})ecies of, 420. 



Polvides rotimdus, observations on, 

 87. 



Polypes, observations on, ^(i. 



Priestley, W. O., on some British spe- 

 cies of Carex, 188. 



Protovirgularia, characters of the new 

 genus, 272. 



Pteroj)us, new species of, 138. 



Ptilodictya, new species of, 286. 



Ptiloris, new species of, 139. 



Ptychomya, observations on the genus, 

 408. ,-.,.,,., , 



Pyramidellidae, observations on the, 

 444. 



Pyritoneraa, new species of, 273. 



Quatrefages, A. de, on the visual 

 organ of the Annelida, 227- 



Radiata, on some new genera and 

 species of Silurian, 270, 474. 



Reeve, L., on new species of Bulimus, 

 61 ; on a new species of Cvtherea, 

 291. 



Regalecus glesne, note on the occur- 

 rence of, 496. 



Reptiles, on a new genus and six new 

 species of Saurian, 344. 



Respiration, on the organs of, in the 

 Arachnida, GiT . 



Retepora, new species of, 477. 



Rhyncolophus, new species of, 187. 



Rimula, new species of, 416. 



Rissoa, on some species of, 33. 



Rissoina, new species of, 419. 



Rostellaria, new species of, 419. 



Rotifera, descriptions of new, 18. 



Royal Society, proceedings of the, 125. 



Rubi, characters of new British, 490. 



Ruticilla, new species of, 140. 



Salter, Dr. J., on Lerneonema Bairdii, 

 85. 



Salticus, new British species of, 336. 



Saurian reptiles, on a new genus and 

 six new species of, 344. 



Saw-fly, on the oeconomy of a new 

 species of, 393. 



Scalaria, new species of, 419. 



Schizosiphon, on a new British Alga 

 belonging to the genus, 266. 



Schcenobates, characters of the new- 

 genus, 343. 



Scopolia, observations on, 35. 



Sea, on the luminosity of the, 425. 



SeaU variat|pp.,A» IfrP t^e^ffeoftf/i^^f 

 crested, 58. ;. . ,:, .„,,,V, ,i,iil// 



Selanthia, new species of, 393. .^^j 



Serpents of St. Lucia, on the, 1^ 



Serpula, new species of, 420. 



Shells, new :-61, 148,212, 230,251, 

 291, 300, 386; fossil, on some, from 

 the middle division of the inferior 

 oolite in Gloucestershire, 401. 



Sirex gigas, occurrence of, at Bath, 

 60. 



Sitta, new species of, 141. 



Snails, long- suspended vitalijty, of^,^8. 



Solarium, new species of, 419. 



Sowerby, G. B., jun., on a new genus 

 of Pholadidae, and on a remarkable 

 specimen of Pholas calva, 299. , ;/ 



Sowerby, J. D. C, ou some mon- 

 strous flowers of Pelargoniums, 

 144 ; on the names of the Victoria 

 water-lily, 310. -iiil^" 



Sphaerodactylus, new speciesoi,^^/. 



S[)haeronema deformans, remai'ks on, 

 30.9. 



Sphecotheres, new species of, 140. / 



Spongarium, new species of, 281. 



Strephodes, new species of, 275,,37{9» 

 474. :'^ 



Streptaxis, new species of, 291. ^ t, 



Strickland, H. E., on the dodo and its 

 kindred, 290. 



Stromatopora, new species of, 377«r/ 



Strombodes, new species of, 274. .- 



Stylifer, observations on the genus, 

 463. 



Succinea, on the habits of a Cape)251 ; 

 new species of, 297. 



Syme, J. T., on the occurrence of 

 Eleocharis uniglumis, 145. 



Syngnathi, notes on the, 396. 



Tancredia, characters of the new ge- 

 nus, 407, 424. ..^/ 



Taxocrinus, new species of, 289. .', / 



Teredo megotara, on the anatomy of, 

 328. 



Tetrodon Pennantii, capture of, 311. 



Thoraisus, new British species of, 33/. 



Thracia, new species of, 230. 



Toads, way in which the skins are 

 shed by, 69. 



Tornatellidic, observations ou the, 444. 



Tornatellina, new species of, 251, 386. 



Townsend, F., on Glyceria pedicellata, 



Trees, efi\?cts of lightning on, 14f^#( > 



