Journal of tu 



Ropal n^icroscoplcal Societp 



CONTAINING ITS TRANSACTIONS AND PROCEEDINGS 



AND 



A SUMMARY OF CURRENT RESEARCHES RELATING TO 



(principally Invertebrata and Cryptogamia) 



EDITED BY 

 CHARLES SINGER, M.A. M.D. F.R.C.P. 



WITH THK ASSISTANCK 01<' THE PUBLICATION COMMITTEE AND 



J. ARTHUR THOMSON, M.A. LL.D. A. N. DISNEY, M.A. B.Sc 



Regtus Professor of Natural History in the F. IAN G. RAWLINS 



University of A berdeen 



FELLOWS OF THE SOCIETY 



A. B. RENDLE, M.A. D.Sc. F.R.S. F.L.S. 



Keeper, Department of Botany, British Museu>n 

 AND 



RALPH ST. JOHN BROOKS, 

 M.A. M.D. D.P.H. D.T.M. & H. (Camb.) 



Minimis partibus, per totum Naturae campum, certitudo omnis innititur 

 quas qui fugit pariter Naturam fugit. — Linnmis. 



FO R THE YEAR 

 1921 



TO BE OBTAINED AT THE SOCIETY'S ROOMS 



20 HANOVER SQUARE, LONDON, W.i 

 OF Messrs. WILLIAMS & NORGATE, 14 Henrietta Street, London, W.C.2 

 AND OF Messrs. DULAU & CO., Ltd., 34 Margaret Street, London, W.i 



