io8 



BIOLOGY AND ITS MAKERS 



For a time the great German scientist tried to maintain his 

 point, that the infusoria have many stomachs, but this was 

 completely swept away, and finally the contention of Von 

 Siebold was adopted to the effect that these animals are each 

 composed of a single cell. 



In 1845 Stein, whose influence was greater than that of 

 Ehrenberg, is engrossed in proposing names for the suborders 



FIG. 31. EHRENBERG, 1795-1876. 



of infusoria based upon the distribution of cilia upon their 

 bodies. This simple method of classification, as well as the 

 names introduced by Stein, is still in use. 



Since Stein there have been many workers on protozoa, 

 but the researches of Richard Hertwig, Biitschli, Doeflein, 

 and Fritz Schaudinn are of especial importance, and with the 



