a-. 



THE SMALLEST LIVING THINGS 



Life as Revealed by the Microscope 



By Gary N. Calkins, Ph.D., Sc.D. 



PROFESSOR OF PROTOZOOLOGY 

 COLUMBIA UNIVERSITY 



and at the 

 MARINE BIOLOGICAL LABORATORY 



To 



My three sons 



Henry Seymour, 

 Gary Nathan, 



AND 



Samuel Williston 



in affectionate remembrance 

 of happy days together 



