

THE 



NATURALISnrjaN24i92o) 



MONTHLY JOURNAL OF 



NATURAL HISTORY POR THE NORTH OP 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 Vokkshirk Naturalists' Union; the Spalding Gentlemen's 

 Society; the Doncastek Scientific Society; the Seley Scientific Society. 



AND 



THOMAS WILLIAM WOODHF.AD, Ph.D., M.Sc, F.L.S. 



Lecturer in iiioi.oGV, Technical College, HuniiFRSFiELn ; 



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. KEND.\LL, M.Sc, F.G.S. JOHN W. TAYLOR, M.Sc. 



RILEY FORTUNE. F.Z.S. 



1918. 



LONDON : 



A. Brown & Son.s, Ltd.. 5, F"akringi)ON Avknuh, E.C, 



And at Hi r.i. and York. 



