Journal 



OF THE 



Royal 

 Microscopical Society; 



CONTAINING ITS TRANSACTIONS AND PROCEEDINGS, 



AND A SUMMARY OF CURRENT RESEARCHES RELATING TO 



(principally Invertebrata and Cryptogamia), 



BOTANICAL 



Edited by GARDEN 



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 CoiIMITTEK AND 



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



Lecturer on Botany at St. Thomas's Hospital, Fro/essor o_f Comparative Anatomy in King's College, 



JOHN MAYALL, JuN., F.Z.S., E. G. HEBB, M.A., M.D. {Cantab.), 



AND 



J. ARTHUR THOMSON, M.A., 



Lecturer ofi Zoology in the Sc/wol of Medicitie, Edinhirgh, 

 FELLOWS OF THE SOCIETY. 



FOR THE YEAR 

 1889. 



Part 2. 



PUBLISHED FOR THE SOCIETY BY 



WILLIAMS & NORGATE, 



LONDON AND EDINBURGH. 



