504 
Termites, on the habits of the, 495. 
Tethya carnosa, observations on, 176. 
Tetragnatha, new species of, 81. 
Tettigarcta, new species of, 332. 
Thia polita, notice respecting, 176. 
Thompson, W., notice respecting the oc- 
currence of Alcedo Alcyon, 69; on the 
occurrence of an American bittern in 
Ireland, 91; on the occurrence of Hy- 
peroodon Butzkopf in Belfast bay, 151. 
Thwaites, G. H. K., on the occurrence of 
tetraspores in Algz, 262; on the for- 
mation of the spore in a species of Ve- 
siculifera, 333. 
Tigrisoma leucolopha, description of, 86. 
Tosena, new species of, 331. 
Trochus, new species of, 443. 
Trogon melanocephalus, on the anatomy 
of, 310. . 
enews Goodsirii, notice respecting, 
Umbelliferee, new genera of, 50. 
Vegetable substance, on the causes of 
disjunctions of, 354. 
Venturia, characters of the genus, 225. 
Vesiculifera, on the formation of the spore 
in a species of, 333. 
Vogt, M., on the embryology of Actzon, 
Walker, F., on some new species of Chal- 
cidites, 108, 177, 270. 
INDEX. 
Walton, J., on the genera Phyllobius, 
Polydrosus and Metallites, 12; on the 
genus Sitona, with descriptions of new 
species, 227; on the genera Cneorhi- 
nus and Strophosomus, with descrip- 
tions of new species, 304. 
Warren, Dr. J. C., on the osteology and 
dentition of some North American 
mastodons, 145. 
Waterhouse, G. R., on a new species of 
Hesperomys, 483. 
Wells, W., on a black lizard taken in 
Cheshire, 449. 
Westwood, J. O., on some new Reduvii- 
de, 65; on some new Hemiptera, 67 ; 
on the Indian species of Papilio, 70; 
on new Cimicide, 284; on the sec- 
tional characters of the genus Lucanus, 
496; on a new genus of lamellicorn 
beetles, 497. 
White, A., on some new species of homo- 
pterous insects, 880; on a new genus 
of Crustacea, 497. 
Williamson, W. C., on the supposed 
sponge-spicule of flints, 467. 
Willkomm, M., botanical notices from 
Spain, 115, 187, 263, 340, 420. 
Zoological Society, proceedings of the, 
126, 200, 285, 362, 431, 476. 
Zoophytes, helianthoid, on a new genus ~ 
of, 417. 
END OF THE SEVENTEENTH VOLUME. 
PRINTED BY RICHARD AND JOHN E. TAYLOR, 
RED LION COURT, FLEET STREET. 
