460 
Solitaire, on some bones of the, 335. 
Sowerby, G. B., on some new species 
of Ovulum, 373; on some new spe- 
cies of Cancellaria, 374. 
Sponges, freshwater, new species of, 
31; structure and development of, 
36; excavating, on the, 239, 355. 
Spruce, R., on the Musci and Hepa- 
tice 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. 
Sylvia 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. 
Yortoise-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 
INDEX. 
bob 
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 Cycadew, 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 VOLUME. 
PRINTED BY RICHARD AND JOHN E. TAYLOR, 
RED LION COURT, FLEET STREET. 
ALERB 
FLAMMAM. 
