■ 



The miSH NATURALIST lor 1923 (twelve parts) will be sent to any Address 

 lor lOs. Subscriptions should be sent to Messrs. Eason and Son* Ltd., 4C Lower 

 Sack^ille Street. Dublin. Single Copies, Is. each. 



NATURE. 



A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE. 



PRICE ONE SHILLING. 



"NATURE" contains Original Articles on all subjects coming within the 

 domain of Science, contributed by the most eminent scientific writers 

 of the day. It also contains Reviews of all recent scientific works; 

 Correspondence Columns, which form a medium of scientific discussion 

 and of Intercommunication among men of Science ; Reports of the 

 Proceedings of the Principal Scientific Societies and Academies of the 

 World ; and Notes on all matters of current scientific interest. 



SUBSCRIPTIONS TO "NATURE." 



{To all places Abroad) £ s. d 



Yearly ... ... 2 17 



Half-Yearly ... ... 1 10 



Quarterly ... ... 18 



**:» A charge of Sixpence is made for changing "scotch and Irish Cheques. 



Cheques and Money Orders to be made payable to Macmillan & Co., Ltd., St. 



Martin's-st., London, W.C.2. 



THE NATURALIST. 



A Monthly Illustrated Journal of 



NATURAL HISTORY FOR THE NORTH OF ENGLAND. 



EDITED BY 

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



The Museum, Hull : 



AVL 



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



HUDDERSFIELD. 



WITH THE ASSISTANCE AS REFEREES IN SPECIAL DEPARTMRNTS OP 



GEO. T. PORRITT, F.L.S., F.E.S. RILEY FORTUNE, F.2.S. 



JOHN W. TAYLOR, M.Sc. 



' This Journal is one of the oldest Scientific Periodicals in the British Isles dating back to 1833. 

 London : A. BROW];^ & SON, Ltd.. 5 FARRINGDON AVENUE, E.C. 



Prepaid Subscription, 10/6 per annum, posi (r.^e 



Communications to Fe addressed to the Editors of the Naturalist. The Museum. Hull. 



