I X D E X. 



oil 



Pteroeides, new species of, 22. 



Pupa, new species of, /O. 



Pyrosoma, on the development of, 29. 



R«nilla, new species of, 24. 



Retamilia, on the species of, 482. 



Rhamnaceae, on the structure of the 

 seed in the, 7fi- 



Rhiostoma, description of the new 

 genus, 9C). 



Rhyncolus, new sjjecies of, 448. 



Richardson, Sir J., on the occurrence 

 of Acanthocottus sroenlandicus, 

 342. 



Rissoa, new species of, 411. 



Roussel, C, on the generative organs 

 of the Scarabaeidaj, 230. 



Roval Society, proceedings of the. 

 225, 323. 



Rupicola, on the members of the 

 genus, 62. 



Salter, J. W.. on new fossil Crustacea 

 from the Siku'ian rocks, 153. 



Sarcobelemnon, neu species of, 24. 



Sarcojjtilus, new species of, 23. 



Sarepta, characters of the new genus, 

 303. 



Scarabseidae, on the generative organs 

 of the, 230. 



Schneider, A., on the larva of a Xe- 

 matode worm, and on some re- 

 mai'kable peculiarities in the gene- 

 rative organs of the Xematoda, 

 506. 



Sciuras, new species of, 500. 



Sclater, P. L., on a new species of 

 Owl, 146 ; on the Spur-winged 

 Goose, 146; on some new species 

 of Svnallaxis, 332 ; on the time of 

 incubation of some birds, 334 ; on 

 new species of Tyrannida;, 422 ; 

 on new species of Ijirds from Ecua- 

 dor, 427 ; on two new birds from 

 the Rio Napo, 498. 



Sclerostoraa, new species of, 494. 



Scotophilus, new species of, 51. 



Scvphistomata, on the strobilation of 

 the, 504. 



Seals, synopsis of the species of 

 eared. 424. 



Sertularia tricuspidata, note on, 431, 

 504. 



Sertulariadae, descriptions of new, 

 250. 



Shells, descriptions of new, 26, 95, 

 243, 299, 337, 381, 405, 460, 477- 



Skenea, new species of, 412. 



Snakes, descrij^tions of new, 168, 



169. 

 Sophina, notes on the genus, 26. 

 Spathius, new species of, 309. 

 Species, notes on Darwin's theory of 



the origin of, 132, 344, 350. 

 Sphserozosma, on the species of, 192. 

 Spiders, new British, 171. 

 Sponges, on some new forms of, 



495. 

 Statice Dodartii and S. occidentalis, 



notes on, 402. 

 Stewart, J. H., on a malformation in 



Echinus Flemingii, 343. 

 Stigmus, new species of, 304. 

 Streptonema, description of the new 



genus, i9f). 

 Stx'lopsis, characters of the new ge- 

 nus, 406. 

 Styloptygma, characters of the new 



genus, 406. 

 S}Tiallaxis, new species of, 332. 

 Svrnola, characters of the new genus, 



"405. 

 Tapaia, on a species of, from Pulo 



Condore, 71. 

 Tarphius, new species of, 252. 

 Terebratella, new species of, 412. 

 Thompson, W., on some species of 



Eolis, and on a new species of Lo- 



manotus, 48. 

 Tomes, R.F., on new species of Bats, 



51. 

 Toraeuma, description of the new 



genus, 453. 

 Trevoa, on the species of, 487. 

 Trichina spiralis, on the development 



of, 503. 

 Trichotropis, new species of, 411. 

 Trigona, new species of, 305. 

 Trihamraatus, new species of, 121. 

 Tyrannidse, descriptions of new, 422. 

 Umbellularia groenlandica, note re- 

 specting, 25. 

 Unio, new species of, 338. 

 Uriechis, new species of, 168, 342. 

 Ursus marinus of Steller, notes on 



the, 63. 

 Van Beneden, P. J., on the strobilation 



of the Scyphistomata, 504. 

 Velutina, new species of, 411. 

 Vespertilio, new species of, 56. 

 Vireo, new species of, 427. 

 Virgularia, new species of, 20. 

 Walckcuaera, new British species of, 



173. 



