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 \'on 

 Siebold was adopted to the effect that these animals are each 

 composed of a single cell. 



In 18.^5 Stein is engrossed in proposing names for the 

 suborders of infusoria based upon the distribution of cilia 



■*..-- 



Fig. 31. — Ehrexberg, 1795-1876. 



upon their bodies. This simple method of classification, as 

 well as the names introduced bv Stein, is still in use. 



From Stein to Biitschli, one of the present authorities on 

 the grou]), there were many workers, but with the studies of 

 Biitschli on protozoa we enter the modern epoch. 



The importance of these animals in aft'ording a field for 

 experimentation on the simplest expressions of life has 



