APRIL 1909. 



No. 627 



(No. 405 of currtnt series). 



A MONTHLY ILLUSTRATED JOURNAL OF 



NATURAL HISTORY FOR THE NORTH OF ENGLAND. 



EDITED BY 



T. SHEPPARD, F.Q.S., F.S.A.ScoL, 



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



Prof. P. F. KENDALL, M.Sc, F.Q.S., JOHN W. TAYLOR, 



T. H. NELSON, M.B.O.U., WILLIAM WEST, F.L.S. 



RILEY FORTUNE, F.Z.S. 



Contents : — 



Notes and Comments : — Important Work on Diatoms, Evolution of Diatoms, Plankton, 

 Degraded Diatoms; The Doncaster Museum 



Albino Carrion Crow in Yorkshire (Illustrated) — Walter Wilson 



Peloria in Plants [\\\ustrditeA)—F.. Snclgrove, D.A 



The Phytoplankton of the English Lake District (IllustratedJ — H;;;. West, F.L.S.,and 

 G.S. West. M.A.,D.Sc., F.L.S 



' A' mr. Darw\n-Rcv. W.C.Hey,M.A •- 



Hawkweeds— Jo/in Ciyer 



Yorkshire Mosses — C. A. Cheetham 



Notes on ^ooVis—F. M. Burton, F.L.S., F.G.S '.. 



The Present State of Our Knowledge of Carboniferous Geology— /J'. Whcclton Hind, 

 F.R.C.S.. F.G.S 



Reviews and Book Notices (Illustrated) 145, 



Northern News 142,148, 



Illustrations 131, 132, 



PAGES 



129-130 



131 



132-133. 



134-141 

 142 

 143-144 

 144-14;> 

 146-148 



149-156 

 157-159 

 153, 160 

 134, 157 



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