I N D E X. 



519 



Procris, new species of, 221. 



Protula, on the species of, 160. 



Psittacus, uew species of, 452. 



Psopbodes, new species of, 363. 



Psygmobranchus, on tbe species of, 161. 



Pterocbilus, description of tbe new genus, 

 329. 



Pteroglossns, new species of, 62. 



Pteromalus, new species of, 182, 339. 



Pycnogonum, on the characters of, 1. 



Pvthon natalensis, on the habits of, 

 148. 



Quatrefages, :M. de, on tbe organization 

 of tbe invertebrate animals of tbe 

 western coast of France, 28, 342 ; on 

 tbe genus Eolidina, 125 ; on gastero- 

 pod Mollusca, 226 ; on tbe sexes in 

 Holothuria, Asterias, and Planaria, 

 227. 



Ralfs, J., on the British Desraidieae, 187, 

 256, 391, 465 ; on a new genus of 

 Diatomaceae, 328. 



Recluz, M., on new species of Narica, 

 57 ; on some new species of Navicella, 

 Neritina, Nerita and Natica, 130. 



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

 205, 296, 372, 486. 



Rbampbastos, new species of, 61. 



Rliododermis, characters of tbe new 

 genus, 27. 



Richardson, J., generic characters of an 

 undescribed Austraban tish, 280. 



Rodents, on tbe habits of some Chiban, 

 53. 



Roots, on the formation of cells in tbe 

 apices of, 461. 



Sabiion, on tbe ova and fry of tbe, 

 146. 



Saperda, new species of, 425. 



Sars, M., on the development of Star- 

 fishes, 233. 



Savage, Dr. T. S., on tbe habits of Py- 

 thon natalensis, 148. 



Saxifrages, observations on the Irish, 

 374. 



Scalaria, new species of, 364, 441. 



Scolex, on the Irish species of, 163. 



ScyUium Catulus, on the ova of, 23. 



Sedg-nick, Prof., on the geology of North 

 Wales, 377. 



Seladernia, new species of, 337. 



Serioides, new species of, 219. 



Serpula, observations on tbe genus, 153. 



Sertulariadte, on tbe morphology of the 

 reproductive system of the, 385. 



Shells, new, 57," 63, 130, 205, 296, 313, 

 364, 372, 436, 486, 495, 504. 



Sisyphus, new species of, 423. 



Solarium, new species of, 437. 



Sollv, E., on the sobd vegetable oils, 



358. 

 Souleyet, ]\I., on tbe gasteropod Mollusca 



designated by the name of Pblebente- 



rata, 342. 

 Sowerby, G. B., juu., on new species of 



Scalaria, 364; on new shells, 441, 



495. 

 Sowerby, J. D. C, on tbe occurrence of 



Batarrea pballoides, 383. 

 SpigeUa Authelmia, notice respecting, 



461. 

 Spirautbes gemmipara, observations on, 



48. 

 Spirorbis, new species of, 160. 

 Spratt, Lieut., on tbe geology of Malta 



and Gozo, 145. 

 Star-fisbes, on the development of, 233. 

 Stereum, new species of, 327. 

 Strickland, H. E.,on the genus Cartbnia, 



100 ; on the ornithology of the neigh- 

 bourhood of Calcutta, 114; on the 



former existence of struthious birds 



distinct from tbe Dodo in the islands 



near Mauritius, 324 ; on Tbalassidroma 



mebtensis, 348. 

 Taenia, on the Irish species of, 317. 

 Taylor, T., on some new species of British 



Juugermanniae, 11. 

 Telliua, new species of, 504. 

 Templeton, Dr., on some varieties of 



monkeys from Ceylon, 361. 

 Tenebrionidae, new, 222. 

 Teiebra, new species of, 64. 

 Tetmemorus, on tbe British species of, 



256. 

 Tetrarhvncbus, on tbe Irish species of, 



164. 

 Tetrasticbus, new species of, 17, 409. 

 Tbalassidroma mebtensis, observations 



on, 348. 

 Thompson, W., on tbe ova of the lai-ge 



spotted dog-fish, 23. 

 Tburet, G., on tbe antberidia and spores 



of some species of Fucus, 480. 

 Tbylacinus, on tbe rudimental marsupial 



bones in tbe, 62. 

 Tijdscbrift voorNatuurlijke Gescbiedenis, 



review of tbe contents of tbe, 484. 

 Tortoise, account of an enormous fossil, 



501. 

 Toucans, description of two new species 



of, 61. 

 Tribostetbes, characters of the genus, 



219. 

 Tricbosoma, on tbe Irish species of, 475. 

 Tricbocephalus, on the Irish species of, 



477. 

 Tricondyla, new species of, 422. 



