3 m,m 



APRIL 1909. 



No. 627 



(No. 405 of currtnt teiies). 



A MONTHLY ILLUSTRATED JOURNAL OF 



NATURAL HISTORY FOR THE NORTH OF ENGLAND. 



EDITED BY 



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



The Museum, Hull ; 



AND 



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



• RILEY FORTUNE, F.Z.S. 



Contents : — 



PAGES 



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



Degraded Diatoms; The Doncaster Museum 129-130 



Albino Carrion Crow in Yorkshire {\\\ustvat&A)— Walter Wilson 131 



Peloria'fin Plants (Illustrated)— £. Snc/grot'e, 5.^ 132-m 



The Phytoplankton of the English Lake District (Illustrated; — 11 West, F.L.S. , and 



G. S. West, M.A., D.Sc, F.L.S 134-Ul 



' A' Mr. Durwin— Rev. W.C. Hey, M. A • • 142 



Hawkweeds— /o/ni Ciyer 143-144 



Yorkshire Mosses— C. A. Cheetham 144-145 



Notes on Roolns—F. M.Bnrtoyi, F.L.S., F.G.S 146-148 



The Present State of Our Knowledge of Carboniferous Geology— D'. Wheelton Hind, 



F.R.C.S., F.G.S 149-156 



Reviews and Book Notices (Illustrated) 145, 157-159 



Northern News 142, 148, 153, 160 



Illustrations 131, 132, 134, 157 



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