Vlll 
CONTENTS. 
Freshwater Sponges in the Tanks of Bombay. (Genus Spongilla.) By 
H. J. Carter, Esq., Assistant Surgeon 303 
New Booh : — Rare and Remarkable Animals of Scotland, represented 
from living Subjects ; with practical Observations on their Nature, 
by Sir John Graham Dalyell, Bart 311 
Proceedings of the Botanical Society of Edinburgh 315 
The Common Flea {Pulex irritans)’, Instance of a singular Anomaly 
in the History of the Honey Bee, by George Darling, Esq. ; Me- 
teorological Observations and Table 316 — 320 
NUMBER V. 
XXXII. On a new British species of Campy lodiscus. By W. C. 
Williamson, Esq 321 
XXXIII. Notes of Diatomacees found in the stomachs of certain 
Mollusca. By George Dickie, M.D., Lecturer on Botany in the Uni- 
versity and King’s College of Aberdeen 322 
XXXIV. Notice of a new species of Spiridens. By R. K. Greville, 
LL.D. &c. (With a Plate.) 325 
XXXV. Notice of two new species of Ferns belonging to the genera 
Oleandra and Polypodium. By R. K. Greville, LL.D. &c. (With 
a Plate.) 326 
XXXVI. Descriptions of By Francis Walker, F.L.S. ... 328 
XXXVII. Note on the Cyclostomatous genus Pterocyclos, Benson 
{Steganotoma, Troschel). By W. H. Benson, Esq., late Bengal Civil 
Service 345 
XXXVIII. Description of some new Fossil Shells from Bissex Hill 
and Springfield in Barbados. Communicated by Sir Robert H. 
ScHOMBURGK, Ph.D., Member of the Imp. Acad. Nat. Curios. &c. ... 347 
XXXIX. On the Insects of J amaica. By Philip Henry Gosse, Esq. 349 
XL. On the Ventriculidce of the Chalk ; their Classification. By 
J. Toulmin Smith, Esq. (With four Plates.) 352 
XLI. Remarks on the Migrations of By Francis Walker, 
F.L.S 372 
New Books : — Flore de France, par M. Grenier et M. Godron. — A 
Manual of the Botany of the Northern United States, from New 
England to Wisconsin and south to Ohio and Pennsylvania inclu- 
sive, arranged according to the Natural System, by A. Gray, M.D. 374 
Proceedings of the Linnaean Society ; Royal Society 375 — 389 
On a new genus and species of Fossil Ruminantia, Po'ehrotherium Wil~ 
so7ii, by Joseph Leidy, M.D. ; On two new genera of Siliceous- 
