The Journal is issued on the second Wednesday of 

 February, April, June, Aug^ust, October, and December. 



'^1887. Parte. DECEMBER. {"^"fHc!'^"''^^ 



+4^ 



Journal 



OF THE 



Royal 

 Microscopical Society; 



CONTAINING ITS TRANSACTIONS -AND PROCEEDINGS, 



AND A SUMMARY OF CURRENT RESEARCHES RELATING TO 



(principally Invertebrata and Cryptogamla), 



Edited by 



PRANK CRISP, LL.B., B.A., 



Otie of the Secretaries of the Society 

 and a Vice-President and Treasurer of the Linnean Society of London ; 



WITH THE ASSISTAN'CE OF THB PUBLICATION COMMITTEB AND 



A. W. BENNETT, M.A., B.Sa., F.L.S., F. JEFFREY BELL, M.A., F.Z.S., 



L tciurer on Botany at St. Thomas's Hospital, Professor of Comparative A naiomy in King's Celleg; 



JOHN MAYALL, Jdn., F.Z.S., R. G. HEBB, M.A., M.D. (_Canfah.\ 



AND 



J. ARTHUR THOMSON, M.A., 



Lttiurir en Zoology in the School of Medicine, Edinburgh, 

 FELLOWS OF THE SOCIETY. 



WILLIAMS & NORGATE. 



^^ LONDON AND EDINBURGH. ^"^7 



-^ 



PBINTSD BY WM. CLOWKS AND SONS, LIMrTEn.] [srAMFORD STRKBT AND CHARINU CTOM. 



