340 NON-SACCHAROMYCETES OR DOUBTFUL YEASTS 



tinct with often many fat droplets. Budding is uniquely accomplished 

 at both ends of the cells. The cells possess the characteristic ap- 

 pearance of Mycoderma. 



The scum is, at first, almost always made up of yeast cells. These 

 have somewhat the same appearance as the cells in the deposit. They 

 are rarely isolated as in the sediment and are more often united in 

 groups of from 4 to 8 cells. Certain cells have a tendency to elongate 

 and may reach 14 to 20 p, in length. 



After from 14 days to 2 months, a mycelial formation appears in 

 the sediment. The temperature limits for growth are 5 C. and 46- 

 57 C. On wort gelatin the giant colonies have a characteristic ap- 

 pearance. The center is a creamy yellow color and is made up of 

 fine reticulations. The periphery is made up of two zones; first, one 

 with a white color and thick, secondly, one with canals running out to 

 the edge from this center. The gelatin is liquefied. On wort gelatin 

 at 20 C., the colony is grayish white with a dry appearance. The 

 yeast causes a slight fermentation in beer wort and ferments sac- 

 charose, feebly dextrose, energetically levulose and d-mannose. 



MYCODERMA SP. Saito 



This species forms on beer wort a white thick scum which adheres 

 to the sides of the containers. The cells are oval and often curled. 

 The giant colonies develop with a thick gray vegetation. The tem- 

 perature limits for growth are 2-3 C. and 32-35 C. On "koji" 

 decoction, this yeast gives no fermentations. 



MYCODERMA OF FISCHER AND BREBECK 



Fischer and Brebeck l have described a number of Mycoderma under 

 the generic name of Endoblastoderma and Blastoderma. Such are End. 

 amycoides I-IV> liquefaciens, and glucomyces I-IV and Blastoderma 

 salminicolor. The last one is most interesting and the best known. 

 It was found in a sample of sea water south of the island of Azores. 

 The most salient characteristic of this species is that the cells form 

 long extensions at the end of which develop structures like conidia. 

 These quite often develop on the surface of the liquid in contact with 

 air. When examined in a hanging drop, they possess an excessive 

 brilliant aspect. This species possesses a red pigment. 



Two other red Mycoderma have been described or rather observed 

 by Lasche*. Mycoderma humuli, isolated from hop leaves and Myco- 

 derma rubrum, found in a culture of contaminated gelatin. 



1 Fischer, B., and Brebeck, C. Zur Morphologic, Biologic und Syst. der Kahm- 

 pilze, Jena, 1891. 



