(p^ 
The Zoology of the Voyage of H.M.S. Erebus and Terror, 
under the command of Sir James Clark Ross, R.N., E.R.S., during 
the years 1839-1843. By authority of the Lords Commissioners of 
the Admiralty. Edited by John Richardson, M.D., E.R.S., &c., and 
John Edward Gray, Esq., Ph. D., F.R.S., 
The undersigned begs to announce that, having purchased the remaining 
stock of the above, including a considerable number of unpublished 
Plates, and, by the kind co-operation of the Officers of the Zoological 
Department of the British Museum, achieved its completion, he is now 
prepared to supply the concluding portions of this important Zoological 
Work. 
Part XXX.—INSECTS (conclusion). By Arthur Gardiner 
Butler, F.L.S., E.Z.S., &c. Four Plates. Price 10 s. 
Part XX.—CRUSTACEA. By Edward J. Miers, Junior Assistant, 
Zoological Department, British Museum. Four Plates. Price 10s. 
Part XXI.—MOLLUSCA. By Edgar A. Smith, F.Z.S., Zoological 
Department, British Museum. Four Plates. Price 10s. 
Part XXII.—BIRDS (conclusion). By R. Bowdler Sharpe, 
F.L.S., F.Z.S., &c., of the Zoological Department, British Museum. 
Ten Coloured Plates. Price 10s. 
Part XXIII.—MAMMALIA (conclusion). By John Edward 
Gray, Ph. D., F.R.S., F.L.S., &c. Four Coloured and Eight Plain 
Plates. Title and Contents of Vol. I. Price 10s. 
Part XXIV.—REPTILES (conclusion). By Albert Gunther, 
M.A., M.D., Ph. D., F.R.S., V.P.Z.S., Keeper of the Zoological 
Department of the British Museum. Ten Plates. Title and Con¬ 
tents of Vol. II. Price 10s. 
The following sections, each complete, with distinct pagination and Title- 
page, may be had separately. 
BIRDS. — By George Robert Gray, F.R.S., and R. Bowdler Sharpe, 
F.L.S., &c. Thirty-seven Coloured Plates. Price £3 3s. 
FISHES.— By John Richardson, M.D., F.R.S., &c. Sixty Plates. 
Price £3 3s. 
CRUSTACEA. —By Edward J. Miers. Four Plates. Price 10s. 
INSECTS. — By Adam White, M.E.S., and Arthur Gardiner Butler, 
F.L.S., F.Z.S., &c. Ten Plates. Price 21s. 
MOLLUSCA. —By Edgar A. Smith, F.Z.S., &c. Four Plates. 
Price 10s. 
Catalogue of the Lepidoptera of New Zealand. By Arthur 
Gardiner Butler, E.L.S., E.Z.S., &c. Three Plates. Price 7s. 6d. 
E. W. JANSON, 28, MUSEUM STREET, LONDON, W.C. 
