orm Varieties; and on the
Perpetuation of Varieties and Species by Natural Means of
Selection 45

HANBURY, DANIEL, Esq., F.L.S.

Note on Two Insect-products from Persia 178

HIGGINS, Rev. HENRY.

Death of the Common Hive Bee; supposed to be occasioned by
a parasitic Fungus 29

HUXLEY, T. H., Esq., F.R.S., Professor of Natural
History, Government School of Mines.

On some points in the Anatomy of _Nautilus Pompilius_ 36

KNOX, R., Esq., M.D., F.R.S.E.

Contributions to the Anatomy and Natural History of the Cetacea. 63

SMITH, FREDERICK, Esq., Assistant in the Zoological
Department in the British Museum.

Catalogue of Hymenopterous Insects collected at Celebes by
Mr. A. R. Wallace 4

Catalogue of Hymenopterous Insects collected by Mr. A. R.
Wallace at the Islands of Aru and Key 132

WALKER, FRANCIS, Esq., F.L.S.

Catalogue of the Dipterous Insects collected in the Aru Islands
by Mr. A. R. Wallace, with Descriptions of New Species 77

Catalogue of the Heterocerous Lepidoptera collected at Singapore
by Mr. A. R. Wallace, with Descriptions of New Species 183

Catalogue of the Heterocerous Lepidopterous Insects collected
at Malacca by Mr. A. R. Wallace, with Descriptions of New
Species 196

WALLACE, ALFRED R., Esq., and DARWIN, CHARLES
Esq., F.R.S., F.L.S., & F.G.S.

On the Tendency of Species to form Varieties; and on the
Perpetuation of Varieties and Species by Natural Means of
Selection 45

WASHINGTON, Captain.

Natural-History Extracts from the Journal of Captain Denham,
H.M. Surveying Vessel 'Herald,' 1857 32

WETHERELL, JOHN W., Esq.

Notice of the occurrence of recent Worm Tracks in the Upper
Part of the London Clay Formation near Highgate 31

INDEX 199

JOURNAL OF THE PROCEEDINGS

OF THE

LINNEAN SOCIETY OF LONDON.

On the Importance of an Examination of the Structure of the Integument
of Crustacea in the determination of doubtful Species.--Application to
the genus _Galathea_, with the Description of a