New Series, No. CXXXIII (Vol. XXXIV, Part 1). 



AUGUST, 1892. 

 1 THE 



Price 10s. 



h 



^M'/^. .^^ 





QUARTERLY JOURNAL 



OF 



MICKOSCOPICAL SCIENCE. 



BDITKD BY 



E. EAY LANKESTER, M.A., LL.D., F.K.S., 



Linacre Professor of Human and Comparative Anatomy, Fellow of Merlon College, and 

 Honorary Fellow of Exeter College, Oxford. 



WITH THK CO-OPKBATION OK 



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



Lecturer on General Anatomy and Physiology in the Medical School of St. Bartkotometc's Hospital, 



London ; 



ADAM SED&WICK, M.A., F.E.S., 



Fellow and Lecturer of Trinity College, Cambridge ; 



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 Prof essor of Zoology 

 in the Owens College, Manchester . 



WITH LITHOGRAPHIC PLATES AND ENGKAVINGS ON WOOD. 



LONDON: 

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



5^ MDCCCXCII. 



Hard and Son,] 



[Bartholomew Close. 



