SIRF 
QUARTERLY JOURNAL 
OF 
MICROSCOPICAL SCIENCE: 
EDITED BY 
E. RAY LANKESTER, M.A., LL.D., F.R.S., 
Linacre Professor of Human and Comparative Anatomy, Fellow of Merton College, and 
Honorary Fellow of Exeter College, Ouford. 
WITH THE CO-OPERATION OF — 
Bo bEeEN. MD... BRS: 
Lecturer on General Anatomy and Physiology in the Medical School of 
St. Bartholomew's Hospital, London ; 
ADAM SEDGWICK, M.A., F.R.S., 
Fellow and Lecturer of Trinity College, Cambridge ; 
AND 
A. MILNES MARSHALL, M.A., D.Sc., M.D., F.R.S., 
Late Fellow of St. John’s College, Cambridge ; Professor in the Victoria University ; 
Beyer Professor of Zoology in the Owens College, Manchester. 
VOLUME XXXIII.—New Sertzs. 
With Aithographic Plates and Engrabings on Wood. 
LONDON: 
J. & A. CHURCHILL, 11, NEW BURLINGTON STREET. 
"1892. 
