THE SCIENTIFIC MEMOIRS 
OF 
THOMAS HENRY HUXLEY 
EDITED BY 
PROFESSOR SIR MICHAEL FOSTER, K.C.B.,M.A.,M.D.,LL.D.,F-.R.S. 
AND BY 
PROFESSOR E. RAY LANKESTER, M.A., LL.D., F.R.5. 
IN FOUR VOLUMES 
VOL. II 
Londow 
MACMILLAN AND CO. LimitTep 
NEW YORK: D. APPLETON AND COMPANY 
1899 
All rights reserved 
