The Journal is issued on the third Wednesday of 
February, April, June, August, October, and December. 
1890. Part 2. 
/ / / 
APRIL. 
(To Non-Fellows, 
I Price 6s. 
Journal 
OF THE 
Royal 
Microscopical Society; 
CONTAINING ITS TRANSACTIONS AND PROCEEDINGS, 
AND A SUMMARY OF CURRENT RESEARCHES RELATING TO 
ZOOXiOG-^ -A.isri> 
(principally Invertebrata and Cryptogamia), 
ISA <Scc. 
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 Botajiy at St. Thomas’s Hospital, | R. G. HEBB, M.A., M.D. (^Cantab.), 
AND 
T. ARTHUR THOMSON, M.A., 
Lecturer on Zoology hi the School of Medicine, Edinburgh, 
FELLOWS OF THE SOCIETY. 
WILLIAMS & NORGATE. 
’■ LONDON AND EDINBURGH. 
printed by \VM. CLOWES AND SONS, LIMITED,] 
[STAMFORD STREET AND CHARING CROSS. 
