QUARTERLY JOURNAL 
OF 
MICROSCOPICAL SCIENCE: 
EDITED BY 
E. RAY LANKESTER, M.A., LL.D., F.R.S., 
Fellow of Exeter College, Oxford, and Jodrell Professor of Zoology in University 
College, London ; 
WITH THE CO-OPERATION OF 
W. T. THISELTON DYER, M.A., C.M.G., F.R.S., 
Assistant Director of the Royal Gardens, Kew ; 
By KEEN, M.D BLES: 
Joint- Lecturer on General Anatomy and Physiology in the Medical School of 
St. Bartholomew's Hospital, London ; 
H. N. MOSELEY, M.A., LL.D., F.B.S., 
Linacre Professor of Human and Comparative Anatomy in the University of Oxford, 
AND 
ADAM SEDGWICK, M.A., F.RS., 
Fellow and Assistant-Lecturer of Trinity College, Cambridge. 
VOLUME XXVI.—NEw Senrizs. 
With Aithographic Plates and Engrabings on Wood. 
LONDON: 
J. & A. CHURCHILL, 11, NEW BURLINGTON STREET. 
"1886, 
