EVOLUTION, EXPRESSION, 



AND SENSATION, 



CELL LIFE AND PATHOLOGY. 



JOHN CLELAND, M.D., F.R.S., 



PROFESSOR OF ANATOMY IN THE UNIVERSITY OF GLASGOW. 



GLASGOW: 



JAMES MACLEHOSE, ST. VINCENT STREET, 

 to the BnitersitE. 

 1881. 



All rights reserved. 



