MYCODERMA CHEVALIERI 



339 



possessing short lateral buds at their points of contact. This gives 

 them the appearance of the mycelium of Dematium. Giant t colonies 

 show less development than those of Mycoderma lactis a. They are 

 membranous and possess a concavity surrounded by an elevated 

 portion. The edge is lightly folded and indented. The colony pos- 

 sesses a superficial crust of a whitish color. 



Other Mycoderma have been mentioned but they are less known. 

 Among them may be mentioned Mycoderma sphaeromyces (Rothen- 

 bach) which ferments dextrine and Mycoderma saprogenes sake (Taka- 

 hashi) which was found in an alteration of sake*. 



f\ 

 c~-Q ^ 







Fig. 146-A. Mycoderma Cheva- 



lieri. Cells f 

 Growth after 

 Guilliermond). 



MYCODERMA CHEVALIERI. Guilliermond 



This species was found along with 

 Saccharomyces Linderii in the fermenta- 

 tion of an alcoholic drink similar to Eng- 

 lish ginger beer. On beer wort at 25 C., 

 it develops rapidly, forming a sedimental 

 growth after 24 hours. A scum is also 

 formed on the surface. The scum ap- 

 pears as little floating islands which soon 

 become confluent to form a continuous 

 scum which adheres to the sides of the 

 container, forming a marked ring. This 



scum is very thin and of a grayish yellow " 7." Cells Trom^'Sedimental 

 color. It does not contain air bubbles. Growth after 44 Hours ( after 

 It is very delicate and falls to the bottom 



of the culture flask when it is dis- 

 turbed. Another re-forms very 

 quickly. It has the same characteris- 

 tics as the scum formed by Zygosac- 

 charomyces Chevalieri. 



When examined at the end of 24 

 hours, the sediment shows almost 

 constantly yeasts isolated or united 

 two by two. These are generally 

 small and elongated; rarely are they 

 short or oval. Their dimensions 

 vary between 3 and 5ju wide and 4 

 and 14 JJL long. Their average size is 

 Fig. 146-B. Mycelial Formation in about 3.96 X 6.21 fJL. The contents 

 Mycoderma Chevalieri, Showing At- of the cells are quite transparent with 



tached Yeast Structures (after Guil- 

 liermond). 



.. 

 one or two large vacuoles less dis- 



