

MAR il 1899 



New Series, No. 164 (Vol. 41, Part 4). 



JANUAEY, 1899. 



Price 10s. 



JSIJ THE 



QUARTERLY JOURNAL 



OF 



MICROSCOPICAL SCIENCE. 



EDITED BY 



E. EAY LANKESTEE, M.A., LL.D., F.E.S., 



Director of the Natural History Departments of the British Museum; Honorary Felloiv of Exeter College, 



Oxford ; Corresponding Member of the Imperial Academy of Sciences of St. Petersburg, and of the 



Academy of Sciences of Philadelphia ; Foreign Member of the Royal Bohemian Society of 



Sciences and of the Academy of the Lincei of Rome ; Associate of the Royal Academy of 



Belgium ; Honorary Member of the Neiv York Academy of Sciences, and of the 



Cambridge Philosophical Society, and of the Royal Physical Society of 



Edinburgh ; Associate Member of the Biological Society of 



Paris; Fuller ian Professor of Physiology in the 



Royal Institution of London. 



WITH THE CO-OPERATION OF 



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



Felloiv and Tutor of Trinity College, Cambridge; 



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



Jodrell Professor of Zoology and Comparati-ve Anatomy in Vni-versity College, London; 

 late Fello-w of St. John's College, Cambridge. 



WITH LITHOGRAPHIC PLATES AND ENGRAVINGS ON WOOD. 



LONDON : 

 J. & A. CHUECH1LL, 7, GEEAT MAELBOEOUGH STEEET. 



1899. 



Adlard and Son,] 



[Bartholomew Close. 



