MAY 1906. 



No. 592 



(No. 370 of current series) 



A MONTHLY ILLUSTRATED JOURNAL OF 



NATURAL HISTORY FOR THE NORTH OF ENGLAND. 



EDITED BY 



T. SHEPPARD, F.G.S., 



The Museum, Hull ; 



T. W. WOODHEAD, Ph.D., F.L.S., 



Technical College, Huddersfield ; 

 with the assistance as referees in special departments of 



J. GILBERT BAKER, F.R.S. F.L.S., 

 Prof. P. F. KENDALL, M.5c., F.G.S., 

 T. H. NEL50N, M.B.O.U., 



GEO. T. PORRITT, F.L.S., F.E.S., 

 JOHN W. TAYLOR, 

 WILLIAM WEST, F.L.S. 



Contents : — 



Prominent Yorkshire Workers— 



I. Henry Clifton Sorby, LL.D., F.R.S., F.S.A., F.G.S., etc. (Illustrated) 



The Development of the Senses in Bats (Illustrated)— .4 rt/itif- Whitaker 



On the Belemnites of the Chalk of Yorkshire (Illustrated)— C. Davies Shcrborn, F.G.S. 

 Note on a Rare Form of Actiaocamax {A. Grossouvrei) from the Chalk of York= 



shire (Illustrated)— G. C. Crick, F.G.S. 

 In Memoriam, William Nelson (Illustrated) 



,, William Cudworth (Illustrated) 



Bird Migration (Illustrated)—//. B. Booth 



Field Notes 



Northern News 



Illustrations 



Plates XII., XIII., XIV., XV., XVI., XVII. 



lot, 166 

 ... 154, 



PAGES 



137-144 

 145-151 

 152-154 



155-158 

 159-161 

 161-163 

 164-166 

 163 

 167-16S 

 159, 162 



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