No. 773 



JUNE 1921 . No. 547 of current Series 



A MONTHLY ILLUSTRATED JOURNAL OF 



MATURAL HISTORY FOR THE NORTH OF ENGLAND. 



EDITED BY 



T. SHEPPARD, M.Sc, F.G.S., F.R.G.S., F.S.A.Scot., 



The Museums, Hull ; 

 AND 



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



Technical College, Huddersfield, 

 WITH THE ASSISTANCE AS REFEREES IN SPECIAL DEPARTMENTS OF 



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

 JOHN W. TAYLOR, M.Sc. RILEY FORTUNE, F.Z.S. 



Contents s~ 



PAGB 



Notes and Comments : — The British Association Report ; The 



Mineralogical Magazine ; Lord Sudeley on Museums ; Kew Gardens ; 



The Brent Valley Bird Sanctuary ; Rare Birds ; The Level of the Sea ; 



The New ' Bench Marks ' ; Is the Curlew a Resident British Bird ? 



Sizes of Curlew ... ... ... ... ... ... ... ... 193-19(> 



Sex Habits of the Great Crested Grebe. — Edmund Seloits ... ... 197-200 



The Spiders of Yorkshire, — Wm. Falconer, F.E.S. ... ... ... 201-204 



The Conglomerates underlying the Carboniferous Limestone in the 



N.W. ofEngland.— J. A. Butterfield, M.Sc, E.G. S 205-207 



A New Section near Brantinghamthorpe , Yorkshire. — John Pringle 



F.G.S 208 



Further Observations on the Occurrence of Manganese in Land and 



Fresh -water Mollusca. — A. E. Boycott ... ... ... ... 209-211 



Field Notes : — Isolated Nests of Rooks ; Hygrobia {Pelobius) tarda Herbst. 



near Hull ; Rook's Nest on a Telegraph Pole ; Dyiiscus dimidiatits in 



East Yorkshire ; Osprey in North-east Yorkshire 



Yorkshire Naturalists at South Cave ... ... 



Bibliography : — Papers and Records relating to the Geology of tlie North 



of England (Yorkshire excepted), published during 1920 



In Memoriam :—L. S. Brady, 1867-1921 



Correspondence : — Feeding Habit of the Great Spotted Woodpecker . . 



Book Notice 



Proceedings of Provincial Scientific Societies ... 



Northern News 204, 207, 208, 



News from the Magazines ... 



LONDON : 

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