460 



INDEX. 



Solitaire, on some bones of the, 335. 



'Sowerby, G. B., on some new species 

 of Ovulum, 373 ; on some new spe- 

 cies of Cancellaria, 3/4. 



Sponges, freshwater, new species of, 

 81 ; structure and development of, 

 86 ; excavating, on the, 239, 355. 



Spruce, R., on the Musci and Hepa- 

 ticse of the Pyrenees, 104. 



Squilla, new species of, 381. 



Streptaxis, new species of, 79. 



Strickland, H. E., on the dodo and 

 its kindred, 335 ; on the habits of 

 a living specimen of Nanina vitri- 

 noides, 379. 



Sycobius, new species of, 76. 



Svlvia phragmitis, on the habits of, 

 20. 



Syrnium, new species of, 227. 



Thinogeton, observations on the ge- 

 nus, 357. 



Tomes, R. F., on the occurrence and 

 habits of Vespertilio emarginatus, 

 149. 



Tortoise-shell of Celebes, on the, 297. 



Tretaspis, description of the new ge- 

 nus, 410. 



Trichodina pediculus, observations of 

 the development of the, 269. 



Trigona, on the velvet-like periostraca 

 of, 297. 



Trilobites, on the homologies of the 



cephalic shield of, 396 ; descriptions 



of new genera and species of, 403. 

 Trimerocephalus, description of the 



new genus, 404. 

 Trinucleus, new species of, 411. 

 Triton, new species of, 230. 

 Unio, new species of, 300. 

 Urox, observations on the, 257- * 

 Vespertilio emarginatus, on the oc- 

 currence and habits of, 149. 

 Vioa, new species of, 241. 

 Vitrina, new species of, 69. 

 Voelcker, Dr. A., on the chemical 



composition of the fluid in the as- 



cidia of Nepenthes, 128. 

 Walker's, F., descriptions of Aphides, 



41, 195. 

 Westwood, J. O., on the identification 



of a genus of parasitic hymenoptera, 



39 ; on Melittobia Audouinii, a bee 



parasite, 288. 

 White, A.,- on two new species of 



Crustacea, 381. 

 Woods, J., on the genus Atriplex, 282. 

 Yates, Jas., on some specimens of the 



natural order Cycadeae, 365. 

 Zanthopsis, description of the new 



genus, 162. 

 Zoological Society, proceedings of the, 



56, 146, 371, 443. 

 Zoophyte, on a supposed new species 



of, 26. 



END OF THE FOURTH VOLUM 



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