LECTURES 



COMPARATIVE ANATOMY AND PHYSIOLOGY 



OF TUB 



INVERTEBRATE ANIMALS, 



DELIVERED AT THE ROYAL COLLEGE OF SURGEONS. 



BY RICHARD OWEN, F.R.S/^toOs^- /. 



HUNTERIAN PROFESSOR TO THE COLLEGE. 



'^^. 



L I L? R A R Y 



/ 





SECOND EDITION. 



IX.I.USTRATSD BY I7UMEROXTS IVOOBCUTS. 



LONDON: 



LONGMAN, BROWN, GREEN, AND LONGMANS. 



1855. 



