Journal 



OF THE 



Royal 

 Microscopical Society 



CONTAINING ITS TRANSACTIONS AND PROCEEDINGS, 



AND A SUMMARY OF CURRENT RESEARCHES RELATING TO 



(principally Invertebrata and. Cryptogamia), 



Edited by 



FRANK CRISP, LL.B., B.A., 



One of the Secretaries of the Society 

 and a Vice-President and Treasurer of the Linnean Society of London ; 



WITH THE ASSISTANCE OF THE PUBLICATION COMMITTEE AND 



A. W. BENNETT, M.A., B.Sc, F.L.S., F. JEFFREY BELL, M.A., F.Z.S. 



Lecturer on Botany at St. Thomas's Hospital, Professor of Comparative Anatomy in King's College. 



JOHN MAYALL, Jun., F.Z.S., R. G. HEBB, M.A., M.D. (^Cantab.) 



AND 



J. ARTHUR THOMSON, M.A., 



Lecturer on Zoology in the School of Medicine, Edinburgh, 

 FELLOWS OF THE SOCIETY. , 



FOR THE YEAR 

 1889. 



Part 1. 



PUBLISHED FOR THE SOCIETY BY 



WILLIAMS & NORGATE, 



LONDON AND EDINBURGH. 



