d 



'EH ^1898 



^>oioO ^ 6 



New Series, No. 159 (Vol. 40, Part 3). 



DECEMBER, 1897. 



Price 10s. 



r'^ 



THE 



QUARTERLY JOURNAL 



OF 



MICROSCOPICAL SCIENCE. 



EUITKI) HY 



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



Linacre Professor of Comparati-ve jinatomy, Felloiu of Merton College, and 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 ; Associate 



Member of the Biological Society of Paris. 



WITH THE CO-OPERATION OF 



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



Felloiv and Tutor of Trinity College, Cambridge ; 

 AND 



W. p. R. WELDON, M.A., F.R.S., 



Jodrell Professor of Zoology and Comparative Anatomy in Uni-versity College, London; 

 late Felloiv of St. John's College, Cambridge. 



WITH LITHOGEAPHIC PLATES AND ENGKAVINGS ON WOOD. 



LONDON: 



J. & A. CHURCHILL, 7, GREAT MARLBOROUGH STREET. 



1897. 



Adiard and Son,] 



XBartholomew Close. 



