;i 9 



New Series. No. CXXXV (Vol. XXXIV, Part 3). Price 10s. 



JANUAEY, 1893. 



^ / THE 



QUARTERLY JOURNAL 



OF 



MICROSCOPICAL SCIENCE. 



EDITED BY 



E. EAT LANKESTER, M.A., LL.D., F.R.S., 



Linacre Professor of Human and Comparatire Anatomy, Fellow of JUerton College, and 

 Honorary Fellow of Exeter College, Oxford ; 



WITH THE CO-OPKRATION OF 



ADAM SEDGWICK, M.A., F.E.S., 



Fellow and Lecturer of Trinity College, Cambridge ; 



A. MILNES MAESHALL, M.A., D.Sc, M.D., F.E.S., 



Late Fellow of St. John's College, Cambridge ; Professor in the Victoria University ; Beyer Professor of Zoolugy 

 in the Owens College, Manchester . 



W. F. E. WELDON, M.A., F.E.S., 



Jodrell Profeaior of Zoology and Comparative Anatomy in University College, London 

 Fellow of St. John's College, Cambridge. 



WITH LITHOGRAPHIC PLATES AND ENGRAVINGS ON WOOD. 



LONDON: 



J. & A. CHUECHILL, 11, NEW BUELINGTON STEEET. 



MDCCCXCIII. 



Adlard and Son,] [Bartholomew Close. 



