108 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 is engrossed in proposing names for the 
suborders of infusoria based upon the distribution of cilia 
Fic. 31.—EuRENBERG, 1795-1876. 
upon their bodies. This simple method of classification, as 
well as the names introduced by Stein, is still in use. 
From Stcin to Biitschli, one of the present authorities on 
the group, there were many workers, but with the studies of 
Biitschli on protozoa we enter the modern epoch. 
The importance of these animals in affording a field for 
experimentation on the simplest expressions of life has 
