i6o 



GENERAL BIOLOGY OF MICRO-ORGANISMS 



The sexual fertilization is not followed by any special kind of divi- 

 sion. Balantidium is the only genus of present interest as a cause 

 of human disease. See Balantidium coli p. 435. 



OUTLINE CLASSIFICATION OF MICRO-ORGANISMS. 



Specific Nomenclature. A species is properly designated only 

 by a binomial Latin name, the first member being that of the 

 genus, such for example as Mucor mucedo, Saccharomyces cere- 

 visiae, Bacillus coli, Spirochoeta pallida, Plasmodium falciparum, 

 and Balantidium coli. A third term may be employed to des- 

 ignate a variety of a species, but such usage should not be per- 

 sisted in. It is possible to give the variety a new specific name 



