1/ 



3 



THE 



NATURALIST: 



A 

 MONTHLY JOURNAL OF 



NATURAL HISTORY FOR THE NORTH OF ENGLAND 



EDITED BY 



THOS. SHEPPARD, M.Sc., F.G.S., F.R.G.S., F.S.A.(Scot.). 



Curator of the Municipal Museums, Hull. 



Hon. Member of the Yorkshire Naturalists' Union; the Spalding Gentlemen's 

 Society; the Doncaster Scientific Society; the Selby Scientific Society. 



and 



THOMAS WILLIAM WOODHEAD, Ph.D., M.Sc, F.L.S. 



Lecturer in Biology, Technical College, Huddersfield ; 

 with the assistance as referees in special departments of 



J. GILBERT BAKER, F.R.S., F.L.S. GEORGE T. PORRITT, F.L.S., F.E.S. 



Prof. PERCY F. KENDALL, M.Sc, F.G.S. JOHN W. TAYLOR, M.Sc. 



RILEY FORTUNE, F.Z.S. 



9 



1917. 



LONDON : 



A. Brown & Sons. Ltd., 5, Farringdon Avenue, E.C, 



And at Hull and York. 



