CONCHOLOGY. 
G. B. SOWERBBY, in constant receipt of 
interesting SHELLS from all parts of the world, 
supplies Specimens and Coilections from his 
large and varied stock, and sends selections to 
‘amateurs on approval. 
Bocks by G, B. SOWERBY, F.L.S.: 
“Thesauvus Conchyliovwn:’’ in parts or mono- 
graphs. 
"Tllustvated Index of British Shells.’ Coloured 
figures of all known species, 30/- nett. 
‘« Marine Shells of South Africa,” 12/- nett. 
COLLECTIONS PURCHASED. 
MUSEUMS AND PRIVATE COLLECTIONS CLASSI- 
FIED, NAMED AND ARRANGED. 

GEOLOGY AND PALAEONTOLOGY 
QUEENSLAND AND NEW GUINEA. 
WITH 68 PLATES 
AND 
A GEOLOGICAL MAP. 
By R. L. JACK and R. ETHERIDGE, Jun. 
3 Vols., to. £2 Qs. 
DULAU & CO, 
121 Fulham Road, London,S.W.| 32% Soho Square. 

Imperial 4to, to be completed in 3 parts, 
price £3 3s. each net. 
THE AVIFAUNA OF LAYSAN 
AND THE NEIGHBOURING ISLANDS, 
with a complete History of the Birds of the 
Hawaiian Possessions. By the Hon. WALTER 
ROTHSCHILD, F.Z.S., &c. 
PART I., containing 13 hand-coloured and 6 
uncoloured Plates by Keulemans and Frohawk, 
together with 18 Collotype Photographs, depicting 
various phases of bird-life, &c., will be ready 
August 1 (8 New Species of Birds will be herein 
figured for the first time). 
rR. HH. PORTER, 
18 Princes Street, Cavendish Square, W. 
THE IRISH NATURALIST. 
A Monthly Journal of General Irish Natural History 
BOTANY. ZOOLOGY. GEOLOGY. 
Edited by Geo. H. CarrPenter. B.Sc., and R. LLoyp 
PRAEGER, B.A. 
This Magazine should be in the hands of all naturalists 
interested in the distribution of animals and plants over 
the British Islands. 
Vol I. (1892) now complete. Price3s.6d. Vol. II. (1893) 
will be sent monthly to any address for 5s. 
Among the contributors to Vol. I. were Prof. G.A.J. Cole. 
Prof. T. Johnson, Dr. R. F. Scharff, A. G. More, kev. 
W. F. Johnson, R. J. Ussher, R Warren. 
Articles will also appear by the above in Vol. II., as 
well as by Dr. V. Ball, Prof. W, J. Sollas, Prof A. C. 
Haddon, Prof. M. M. Hartog, Rev. H. Friend, R. M. 
Barrington, W. F. de V. Kane. 
DUBLIN! EASON & SON, 40 Lower Sackville Street (to which 
address subscriptions should be sent). London: Simpkin, Marshall 
Hamilton, Kent & Co. 

OF WARD BOOKSE LBEARNS', PRICE 7S DePR his 
ANNUAL SUBSCRIPTION (Post Free), SIX SHILLINGS. 
THE MIDLAND NATURALIST, 
A Monthly Natural History Magazine 
and the Journal of the Midland Union of Natural History Societies. 

Vol. XVI. commenced January, 1893. 

London: Simmpkin, Marshall & Co, Led. 
Birmingham: Cornish Bros, 

Watkins & Doncaster, 
Paturalists, 
36 STRAND, LONDON, wW.c. 
(Five doors from Charing Cross), 
Aras in stock every description of Apparatus and 
Cabinets of the best make for Entomologists, 
Ornithologists, Botanists, &c. 
Our new LABEL-List oF BriTISH MAcRo-LEPIDOPTERA, 
with Latin and English Names, ts. 6d. post free. Also other 
useful Label and Exchange-Lists of Lepidoptera, Birds’ 
Eggs; useful Books on Insects, Eggs, &c. 
An Enormous Stock of British, European 
and Exotic Butterflies, and British 
Birds’ Eggs, &c. 
A detailed Price List sent post free on application 

ALL APPLICATIONS FOR ADVERTISE- 
MENT SPACE IN THIS JOURNAL 
SHOULD BE SENT TO 
John Haddon & Co., 
BOUVERIE HOUSE, 
SALISBURY SQUARE, LONDON, E.C. 
