WATKINS & DONCASTER 
NATURALISTS , 
36, STRAND, LONDON, W.G.2 
(Five doors from Charing Cross), 
P.O. Box 126 Telephone: Temple Bar 9451,, 
Keep in stock every description of 
APPARATUS, CABINETS, BOOKS & SPECIMENS 
for Collectors of 
BIRDS’ EGGS, BUTTERFLIES, MOTHS, Etc. 
Catalogue (96 pages) sent post free on application. 
Issued bi-monthly. Illustrated with Plates and Text Figures. 
To Subscribers, 12s. 6 d. post free. 
The Scottish Naturalist 
With which is incorporated ‘ The Annals of Scottish Natural History ’ 
EDITE© BY 
PERCY H. GRIMSHAW, F.R.S.E., F.E.S. 
Keeper, Natural History Department, Royal Scottish Museum 
AND 
JAMES RITCHIE, M.A., D.Sc., F.R.S.E. 
Regius Professor of Natural History, University of Aberdeen 
Assisted by:— EVELYN V. BAXTER f.z.s., h.m.b.o.u. ; LEONORA J. RINTOUL, f.z.s., h.m.b.o.u. ; 
H. S. GLADSTONE, m.a., f.r.s.e., f.z.s. ; W. EAGLE CLARKE, i.s.o., ll.d. ; ANDERSON 
FERGUSSON, f.e.s. ; A. C. STEPHEN, b.sc., f.r.s.e. 
Subscriptions should be addressed to the Publishers, 
Messrs. OLIVER & BOYD, LTD., Tweeddale Court, Edinburgh. 
THE BIRDS OF YORKSHIRE 
By T. H. NELSON, M.B.O.U., 
With the co-operation of W. Eagle Clarke, F.R.S.E., and F. Boyes. 
Two volumes. Demy 8vo, 901 pages, including over 200 
Illustrations, beautifully printed in double tone ink, from photo- 
graphs by R. Fortune, F.Z.S., and other well-known naturalist 
photographers, also three-colour plates, including specially designed 
title pages. Cloth boards, 17/6 net, post free, 18/3. 
London : A. BROWN & SONS, Ltd., 5 Farringdon Avenue, E.C. 4 . 
And at Hull. 
BINDING “ THE NATURALIST ” 
Volumes of THE NATURALIST for 
any year can be bound in a serviceable 
and attractive Cloth Case , dark blue 
and gilt lettered on back and side. Price 
4 /- per volume, or post free 4 / 6 . 
A. BROWN & SOIVS, LIMITED 
PERTH STREET WEST, HULL 
