/i 



QUARTERLY JOURNAL 



MICROSCOPICAL SCIENCE 



EDITED BT 



E. RAY LANKESTER, M.A., F.R.S., RL.S., 



Fellow of Exeter College, Oxford, and Professor of Zoology and Comparative 

 Anatomy in University College, London ; 



WITH THE CO-OPEEATION OF 



WILLIAM ARCHER, F.R.S., M.R.LA., 



Duhlin. 



F. M. BALFOUR, M.A., F.R.S., F.L.S., 



Fellow and Lecturer of Trinity College, Cambridge. 



E. KLEIN, M.D., F.R.S., 



Lecturer on Histology in St. Bartholomeiv's Hospital Medical School, London. 



VOLUME XVIIL— New Seeies. 

 Sitlj Illustrations on 2(lloob anb ^tone. 



LONDON: 



J. & A. CHURCHILL, NEW BURLINGTON STREET. 



1878. 



