A TREATISE 



ON 



COMPARATIVE EMBRYOLOGY 



BY 



FRANCIS M. BALFOUR, M.A., F.R.S. 



KF.LLOW OF TRINITY COLLEGE, CAMBRIDGE, 

 \M> I'KOKKSSUR OF ANIMAL MORPHOLOGY IN THE UNIVEkSMY. 



IN TWO VOLUMES. 



VOL. I. 



SECOND EDITION. 



REPRINTED 11'fTfiOUT ALTERATION- PROM THE FIRST EDITION. 



Ho nil on : 



MACMILLAN AND CO. 



1885 



[ Tin Right of Translation is reserved.} 



