QUARTERLY JOURNAL 



OF 



MICROSCOPICAL SCIENCE : 



EDITED BY 



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



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

 Anatomy in University College, London ; 



WITH THE CO-OPERATION OF 



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



Fellow of Trinity College, and Professor of Animal Morphology in the University 



of Cambridge ; 



W. T. THISELTON DYER, M.A., C.M.G., F.R.S., F.L.S., 



Assistant Director of the Royal Gardens, Keio ; 



AND 



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



Lecturer on Histology in St. Bartholometv's Sospital Medical School, London. 



VOLUME XXII— New Seeies. 

 Wdi)^ ITitfiograp^it plates VLXiti €ngraWngs on WLaab, 



LONDON: 

 J. & A. CHURCHILL, 11, NEW BURLINGTON STREET. 



1882. 



