962 



THE HIGHER BACTERIA, MOLDS AND FUNGI 



Petruschky proposes the following clear schematization, which, 

 even though possibly defective from a purely botanical point of view, 

 is at least serviceable for the purposes of the bacteriologist. 



Hyphomycetes 



True molds 



Trichomvcetes 



r 



1 



Leptothrix 



Cladothrix 



Streptothrix 



Actinomyces 



Leptofhrix is used to designate those forms which appear as simple 

 threads without branching. 



Cladothrix is a thread-like form in which false branching may be 

 recognized. By false branching is meant an appearance resulting 

 from the fragmentation of threads. The terminal cell breaks away 

 from the main stem, is set at an angle by the elongation of the thread 



FIG. 101. CLADOTHRIX, SHOWING FALSE BRANCHING. 



itself, and, as both continue dividing, the simulation of true branching 

 is produced. 



Streptofkrix denotes forms with numerous true branches and spores 

 which usually appear in chains. 



Actinomyces is of more complicated structure, characterized by the 

 formation of club-shaped ends and the stellate arrangement of its 

 threads. 



Concerning the use of the last three generic names there lias been 

 much controversy, which has recently been discussed with a full 



