58 MICROBES, FERMENTS, AND MOULDS. 



we cannot recognize any mycelium, and in this par- 

 ticular they are allied with the ferments, of which we 

 shall speak presently. The fungus consists of round 

 cells, which multiply by budding. De Lanessan 

 regards them as a separate group, to which he gives 

 the name of Microsporete, while he designates those 

 parasites of skin covered with hair which possess a 

 distinct mycelium under the name of Trichophyta. 

 The Pelade Fungus. Pelade is another disease of 



o 

 Fig. 29. Pelade fungus : epidermic cells, charged with spores ( X 500 diam.). 



the skin covered with hair, which is caused by Micro- 

 sporon Audouini, and which presents the characters 

 just indicated. It would, therefore, be an error to 

 give it the same generic name as Microsporon furfur, 

 a fungus of which the mycelium is well developed, 

 if the recent researches of Grawitz, to which we 

 shall presently return,* did not tend to snow that 

 Microsporese and Trichophyta are only forms of the 

 same parasite in different phases. 



* See chapter on Polymorphism of Microbes. 



