XL. ADVERTISEMENTS. 
Annual Subscription from the Leeds Office, 6/6 post-Sree; (5/- accepted if paid by the 
end of March in cach year). Single numbers 6A. cach, or by post 74. 
THE NATURALIS® 
A MONTHLY JOURNAL of NATURAL HISTORY for the NORTH of ENGLAND. 
Conducted by W. DENISON ROEBUCK, F.L.S., 
WITH THE ASSISTANCE IN SPECIAL DEPARTMENTS OF 
J. GILBERT BAKER, F.R.S., F.1.8., CHAS. P. HOBKIRK, F.L.S , 
W. EAGLE CLARKE, F.I.S., M.B.O.U., GEO. T. PORRITT, F.L.S., F.E.S., 
ALFRED HARKER, M.A., F.G.S., W. B. TURNER, F.R.M.S. 
THis journal has been published under the above title at various times since 1837, and 
has appeared regularly since 1875. ; 
The scope of the journal has for its primary aim the elucidation of the natural history, 
geology, and physical features of the Northern Counties of England—including under that 
name Northumberland, Durham, Cumberland, Westmorland, Lancashire, Cheshire, York- 
shire, Derbyshire, Nottinghamshire, and Lincolnshire. Papers bearing upon the counties 
mentioned therefore take precedence of all others. 
The Naturalist is not, however, merely a medium for the publication of lists and of 
faunal and floral papers exclusively, the Editors having always viewed their field from a 
broad standpoint, and they welcome papers dealing with life-history, variation, folk-lore, 
biological, and phenological and other phenomena, etc., provided they are based upon 
original or personal observation, and that they are not merely résumés or repetitions of 
ordinary text-book information ; and in fact the only natural history papers that are abso- 
lutely unsuitable are such as deal specifically with districts or localities quite outside the 
northern counties, and elementary papers upon general natural history. 
Conchology has always taken a foremost place, and numerous papers and innumerable 
notes upon the land, freshwater, and marine mollusca have appeared. 
The Editors invite aid from all interested in the advancement of natural science in the 
North—both as subscribers to the journal and as contributors of original articles, and par- 
ticularly of short notes and observations on such facts as may be deemed of interest. 
FOSTERS’ STEEL-RIBBED RODS 
ARE SUPERIOR TO ALL OTHERS. 
A CHALLENGE TO THE WORLD! 
WE CHALLENGE any ROD MAKER to a TEST to be 
carried out by duly-qualified Engineers, the LOSING SIDE to pay a 
stated SUM to a PUBLIC CHARITY to be named by the winner. 
(see FOSTERS’ CATALOGUE, 241 pages, 300 illustrations, sent 
post-free per parcel post on receipt of 3 stamps (to pay postage only), or 
COMPLETE LIST, with articles by Mr. C. W. Gedney on ‘Dry Fly 
Fishing”; Mr. J. Taylor (scorer of the highest possible number of points 
for accuracy and delicacy in throwing the fly at the International Tourna- 
ment, 1890), on ‘‘Casting”; and Mr. W. H. Foster on ‘Where to Fish” 
Gllustrated), and with coloured representations of flies, &c., 290 pages, 
“7-7 / = CS . 
price 1/-, which may be deducted from first order amounting to 5/- after- 
wards sent. 
ADDRESS : 
FOSTERS’, ASHBOURNE, ENGLAND. 
