464 
Thomas, O., on a new species of Alac- 
taga, 14. 
Tomes, R. F., on a new species of 
Coral from the Middle Lias, 156. 
Toxodon, on the structure of 'the 
posterior foot of, 389. 
Trichoplus, new species of, 319. 
Trouessart, EK. L., on the influence of 
marine currents in the geographi- 
cal distribution of the Hared Seals, 
70. 
Trypheromera, new species of, 380. 
Tubulipora, new species of, 128. 
Tylaster, characters of the new genus, 
68. 
Typhlocarcinus, new species of, 260. 
Tyrinthia, new species of, 294. 
Uphanteenia, on the structure of a 
specimen of, 237. 
Urochela, new species of, 28. 
Vacuna alni, on the biological evo- 
lution of, 525. 
Valle, Dr. A. Della, on the compound 
Ascidia of the Bay of Naples, 455. 
Varenne, A. de, on the origin of the 
ovum in the Hydroids, 321. 
Vayssiére, A., on the perfect state of 
Prosopistoma punctifrons, 73. 
INDEX. 
Verrill, A. E., on the zoological affi- 
nities of Halysites, 72. 
Voluta, new species of, 88. 
Waenerella borealis, observations on, 
288. 
Walcott, C. D.,-on the nature of 
Cyathophycus, 459. 
Wallich, Dr., on the flints and the 
lithological identity of the chalk 
and recent calcareous deposits in 
the ocean, 46. 
Walsingham, Lord, on North-Ame- 
rican Sphinges and Bombyces col- 
lected by, 506. 
Waterhouse, C. O., on a new species 
of Trichoplus, 319; on Apellor- 
rhina simillima, 362; on the Myrio- 
poda and Insecta of Ascension Is- 
land, 434. 
Whiteaves, J. F., on some remark- 
able fossil Fishes, 159. 
Whitfield, R. P., on the structure of 
Dictyophyton, 167, 237. 
Willett, E., on a Mammalian jaw 
from the Purbeck beds, 155. 
Wood-Mason, J., on the discrimina-~ 
tion of the sexes in Paludina, 86. 
END OF THE EIGHTH VOLUME. 
PRINTED BY TAYLOR AND FRANCIS, 
RED LION COURT, FLEET STREET. 
