The Study 



of 



Animal Life 



BY 



J. ARTHUR THOMSON, M.A., F.R.S.E. 



LECTURER ON^ZOOLOGY, SCHOOL OF MEDICINE, EDINBURGH 



JOINT-AUTHOR OF ' THE EVOLUTION OF SEX ' 



AUTHOR OF 'OUTLINES OF ZOOLOGY' 



SECOND EDITION 



WITH ILLUSTRATIONS 



LONDON 



JOHN MURRAY, ALBEMARLE STREET 

 i 892 



