The Journal is issued on the third Wednesday of 
February, April, June, August, October, and December, 
1890. Part 6. 
DECEMBER. 
I To Non-Fellows, 
\ Price 6s. 
Journal 
OF THE 
fn- Royal 
Microscopical Society; 
CONTAINING ITS TRANSACTIONS AND PROCEEDINGS, 
AND A SUMMARY OF CURRENT RESEARCHES RELATING TO 
ZOOLO G-^5T -A- 1ST H> BOTANY 
(principally Invertebrata and Cryptogamia), 
MICROSCOPY, <fca- 
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. Gr. HEBB, M.A., M.D. ( Catltab . ), 
AND 
J. ARTHUR THOMSON, M.A., 
Lecturer on Zoology in the School of Medicine, Edinburgh, 
FELLOWS OF THE SOCIETY. 
f 
WILLIAMS & NORGATE. 
LONDON AND EDINBURGH. 
r 
PRINTED BY WM. CLOWES AND SONS, LIMITED.] 
[STAMFORD STREET AND CHARING CROSS. 
