(5' 



INDEX. 



503 



common potato and on its introduction 



into Europe, 154. 

 Oreocome, characters of the genus, 50. 

 Ostrea, new species of, 288. 

 Owen, Prof., on the hahits of Echidna, 



126; on the genus Phascolomys, 128; 



on the geographical distribution of ex- 

 tinct mammalia, 197 ; on the anatomy 



of the chimpanzee, 476. 

 Papilio, on Indian species of, 454. 

 Parus, description of a new species of, 452. 

 Paussida), on the oeconomy of the, 88. 

 Pearce, J. C, on the occurrence of the 



embryo of an Ichthyosaurus, 44. 

 Petrosciadium, characters of the genus, 



50. 

 Pfeiffer, Dr. L., on the genus Achatinella, 



133 ; on new species of Helix, 431 ; on 



new species of land-shells from Jamaica, 



441. 

 Phascolomys, on the species of, 128. 

 Philodromus, new species of, 38. 

 Pholcus phalangioides, notice respecting, 



17. 

 Phrynosoma Harlani, notes on, 99. 

 Phyllobius, on the British species of, 12. 

 Physoderes, characters of the genus, Q7. 

 Pieris, new species of, 22. 

 Planorbis imbricatus, on the red colour 



of the blood in, 454. 

 Plantain, on the disease of the, 212. 

 Plants, contributions to the physiology of 



the fecundation in, 5 ; descriptions of 



new, 50, 357, 359. 

 Platycercus, new species of, 59, 288. 

 Pleuropetalum, characters of the genus, 



358. 

 Pleurotoma, new species of, 363, 478. 

 Ploiaria, new species of, 65. 

 Podargus, new species of, 287- 

 ' Polycera, on the development of the ova 



of, 377. 

 Polydrosus, on the British species of, 16. 

 Potato, on the natural habitat of the, and 

 on its introduction into Europe, 154 ; 

 on the disease of the, 275, 294, 375. 

 Prinopleura, new species of, 58. 

 Psammogeton, characters of the genus, 



51. 

 Psilonotus, new species of, 113. 

 Pteromalus, new species of, 270. 

 Quatrefages, M. de, on the red colour of 



the blood in Planorbis, 454. 

 Quekett, J., on the intimate structure of 



bone, 374. 

 Recluz, C. A., on new species of Nerita, 

 292, 362 ; on a new species of Cono- 

 vulus, 295. 

 Reduviida;, descriptions of new, 65. 

 Reeve, L., on new species of shells, 129, 

 290, 363, 478. 



Reid, Dr. J., on the development of the 

 ova of the nudibranchiate moUusca, 

 377. 

 Respiration, on the mechanism of, 448. 

 Rosellinia, characters of the genus, 226. 

 Royal Institution, proceedings of the, 197. 



Royal Society, proceedings of the, 447. 



Rubi, synopsis of the British, 165, 235, 

 314. 



Salticus, new species of, 34. 



Saunders, W. W., on some new Crypto- 

 cephalides, 58. 



Scelio, new species of, 185. 



Schaphespermum, characters of the ge- 

 nus, 51. 



Scladerma, new species of, 272. 



Scolopendrae, on the habits of the, 65, 

 495. 



Scouler, Dr. J., on some rare species of 

 animals found on the coasts of Ireland, 

 176. 



Sea-weeds, a History of British, noticed, 

 429. 



Semnopithecus, description of a new spe- 

 cies of, 335. 



Shells, new, 129, 133, 288, 290, 295, 362, 

 363,431,441,478. 



Sibson, F., on the mechanism of respira- 

 tion, 448. 



Sicily, on the flora of, 124. 



Sitona, on the British species of, 227. 



Smith, F., on the habits of Odynerus An* 

 tilope, 60. 



Spain, on the flora of, 115, 187, 263. 



Spermatozoa of the polar bear, observa- 

 tions on the, 494. 



Sphaeriaceae, observations on the tribe, 

 with descriptions of new genera, 21 7. 



Spiders, descriptions of new, 30, 76. 



Starch, on the formation of, 73, 185. 



Stenotoma, characters of the new genus, 

 284. 



Stictophyllum, characters of the genus, 

 51. 



Stigmodera, new species of, 62, 65. 



Stiliger, characters of the new genus, 3. 



Stocks, Dr. J. E., notes on the botany of 

 Scinde, 419. 



Strepera, new species of, 492. 



Streptolirion, characters of the new ge- 

 nus, 51. 



Strix, new species of, 126. 



Strophosoraus, on the British species of, 

 305. 



Sula, new species of, 493. 



Swintonia, characters of the genus, 362. 



Sylochelidon, new species of, 493. 



Telmessus, characters of the new genus, 

 497. 



Templeton, Dr., on the habits of the Sco- 

 lopendrae, 65, 495. 



