NATURALIST: 
A 
MONTHLY JOURNAL OF 
Natural History for the North of England 
EDITED BY 
W. H. PEARSALL, D.Sc., F.L.S., and W. R. GRIST, B.Sc., 
THE UNIVERSITY, LEEDS. 
with the assistance as referees in special departments of 
H. B. BOOTH, F.Z.S., M.B.O.U. 
J. M. BROWN, B.Sc., F.L.S., F.R.E.S. 
W. H. BURRELL, F.L.S. 
CHRIS. A. CHEETHAM. F.R.E.S. 
W. J. FORDHAM, M.R.C.S., L.R.C.P., 
D.P.H. 
RILEY FORTUNE, F.Z.S., F.R.P.S. 
Professor A. GILLIGAN, D.Sc., F.G.S., M.I.M.E, 
F. A. MASON, F.R.M.S. 
Mrs. Elsie M. MOREHOUSE. 
Thos. SHEPPARD, M.Sc., F.G.S., F.Z.S. 
T. W. WOODHEAD, Ph.D., M.Sc., F.L.S. 
1933 . 
LONDON 
A. Brown & Sons, Ltd., 5 Farringdon Avenue, L.C.4 
And at Hull. 
