The Journal is issued on the third Wednesday of 
February, April, June, August, October, and December. 
£ H 
1891. Part 2. 
APRIL. 
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Wtq ‘l 
Journal 
OF THE 
Royal 
Microscopical Society 
CONTAINING ITS TRANSACTIONS AND PROCEEDINGS, 
AND A SUMMARY OF CURRENT RESEARCHES RELATING TO 
ZOOX,OO^r jP^IsTJD botany 
(principally Invertebrata and Cryptogamia), 
MICROSCOPY, <Sca- 
Edited by 
F. JEFFREY BELL, M.A., 
One of the Secretaries of the Society 
and Professor of Comparative Anatomy and Zoology in King's College ; 
WITH THE ASSISTANCE OF THE PUBLICATION COMMITTEE AND 
A. W. BENNETT, M.A., B.Sc., F.L.S., I JOHN MAYALL, Jun., F.Z.S., 
Lecturer on Botany at St. Thomas's Hospital, | 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. 
WILLIAMS & NORGATE. 
LONDON AND EDINBURGH. 
1 
r 
PRINTED BY WM. CLOWES AND SONS, LIMITED.] 
[STAMFORD STREET AND CHARING CROSS. 
