INDEX. 



519 



Procris, new species of, 221. 



Protula, on the species of, 160. 



Psittacus, new species of, 452. 



Psophodes, new species of, 363. 



Psygmobranchus, on the species of, 161. 



Pterochilus, description of the new genus, 

 329. 



Pteroglossus, new species of, 62. 



Pteromalus, new species of, 182, 339. 



Pycnogonum, on the characters of, 1. 



Python natalensis, on the habits of, 

 148. 



Quatrefages, M. de, on the organization 

 of the invertebrate animals of the 

 western coast of France, 28, 342 ; on 

 the genus Eolidina, 125 ; on gastero- 

 pod Mollusca, 226 ; on the sexes in 

 Holothuria, Asterias, and Planaria, 

 227. 



Ralfs, J., on the British Desmidieae, 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. 



Rhamphastos, new species of, 61. 



Rhododermis, characters of the new 

 genus, 27. 



Richardson, J., generic characters of an 

 undescribed Australian fish, 280. 



Rodents, on the habits of some Chilian, 

 53. 



Roots, on the formation of cells in the 

 apices of, 461. 



Salmon, on the ova and fry of the, 

 146. 



Saperda, new species of, 425. 



Sars, M., on the development of Star- 

 fishes, 233. 



Savage, Dr. T. S., on the 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. 



Scyllium Catulus, on the ova of, 23. 



Sedgwick, Prof., on the geology of North 

 Wales, 377. 



Seladerma, new species of, 337. 



Serioides, new species of, 219. 



Serpula, observations on the genus, 153. 



Sertulariadae, on the 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. 



Solly, E., on the solid vegetable oils, 



358. 

 Souleyet, M., on the gasteropod Mollusca 



designated by the name of Phlebente- 



rata, 342. 

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



Scalaria, 364; on new shells, 441, 



495. 

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



Batarrea phalloides, 383. 

 Spigelia Anthelmia, notice respecting, 



461. 

 Spiranthes gemmipara, observations on, 



48. 

 Spirorbis, new species of, 160. 

 Spratt, Lieut., on the geology of Malta 



and Gozo, 145. 

 Star-fishes, on the development of, 233. 

 Stereum, new species of, 327. 

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



100 ; on the ornithology of the neigh- 

 bourhood of Calcutta, 114; on the 



former existence of struthious birds 



distinct from the Dodo in the islands 



near Mauritius, 324 ; on Thalassidroma 



melitensis, 348. 

 Taenia, on the Irish species of, 317. 

 Taylor, T., on some new species of British 



Jungermanniae, 11. 

 Tellina, new species of, 504. 

 Templeton, Dr., on some varieties of 



monkeys from Ceylon, 361. 

 Tenebrionidae, new, 222. 

 Terebra, new species of, 64. 

 Tetmemorus, on the British species of, 



256. 

 Tetrarhynchus, on the Irish species of, 



164. 

 Tetrastichus, new species of, 17, 409. 

 Thalassidroma melitensis, observations 



on, 348. 

 Thompson, W., on the ova of the large 



spotted dog-fish, 23. 

 Thuret, G., on the antheridia and spores 



of some species of Fucus, 480. 

 Thylacinus, on the rudimental marsupial 



bones in the, 62. 

 Tijdschrift voor Natuurlijke Geschiedenis, 



review of the contents of the, 484. 

 Tortoise, account of an enormous fossil, 



501. 

 Toucans, description of two new species 



of, 61. 

 Tribostethes, characters of the genus, 



219. 

 Trichosoma, on the Irish species of, 475. 

 Trichocephalus, on the Irish species of, 



477. 

 Tricondyla, new species of, 422. 



