The Journal is issued on tlie second Wednesday of 

 February, April, June, August, October, and December. 



/ 



w 



* 1889. Parts. APEIL. { ''"prTcf 6s°.'"'~ 



^ 



Journal 



OF THE 



Royal 

 Microscopical Society; 



CONTAINING ITS TRANSACTIONS AND PROCEJEDINGS, 



AND A SUMMARY OF CURRENT RESEARCHES RELATING TO 



ZOOIiOG-^ST -A-ISTDD B O T -A. 3Sr ^ST 



(principally Invertebrata and Orsrptogamia), 



Edited by 



PRANK 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. JEFFEEY BELL, M.A., F.Z.S., 



Lecturer on Botany at St. Thomas's Hosj>ital, Professorof Comparative Anatomy in Kin^s College, 



JOHN MAYALL, Jun., F.Z.S., E. G. HEBB, M.A., M.D. {Caniab.\ 



AND 



J. AETHUR THOMSON, M.A., 



Lecturer on Zoology in the School of Medicine, Edinburgh, 

 FELLOWS OF THE SOCIETY. 



WILLIAMS & NORGATE, 



LONDON AND EDINBURGH. 



A 



f 



PRINTED BV WM. CLOWBS AND SOMS, LIMITED,] [STAMFORD STREET AKD CHARIKS CR06C. 



