YEASTS AM> M>ru>>. .">7! 



Saccharomyces sphaericus. ( Vlls varying in form; the 

 basal ones of a colony oblong or cylindrical, 10 to 15 p. long, 

 5 /x thick ; the others, round, 5 to 6 /t in diam. Unit-d in ramified 

 families. Spores unknown. 



Saccharomyces anomalus (Hansen). Cells small, oval, and 

 sometimes elongated. Spores are hemispherical, with j trojecting rims 

 at the base. They were found in impure brewery yeast. 



Saccharomyces mycoderma (Mycoclerma cereri*ln- et vini). 

 Cells oval, elliptical, or cylindrical, 6 to 7 p lonjr. - t" ." /t thick, 

 united in richly-branching chains. Spore-forming cells may be 

 20 /A long. Spores 1 to 4 in each mother-cell. The colonies in 

 gelatine are greyish and filmy. They form the so-called "mould" 

 on fermented liquids, and develop on the surface without 

 fermentation. When forced to grow submerged, a little alcohol is 

 produced, but the fungus soon dies. They occur on wine, beer, fruit 

 juices and sauerkraut. 



Saccharomyces albicans (Oidium albicans, Fungus of thrush). 

 Cells round, oval, or cylindrical, 3'5 to 5 /t thick ; the cylindr 

 cells 10 to 20 times as long as they are thick. The bud-colonies 

 mostly consist of rows of cylindrical cells, from the end< of which 

 oval or round cells shoot out. Spores form singly in roundish celb 

 In plate-cultivations the colonies are pure whitv. In tin- depth 

 of gelatine a filament is formed composed of white colonies, some 

 with ray-like processes extending into the gelatine. On potato the 

 fungus forms a rapid white growth, and on bread also, 

 can be easily cultivated in a nutrient solution containing sugar 

 and ammonic tartrate. The cells germinate acc-.nlin- to the rie 

 ness of the fluid in sugar; they either grow into long 

 or, in a very strongly saccharine solution, many daughi 

 formed and bud out in various directions. According t- 

 the thrush-fungus is pathogenic in rabbit* death tak 

 twenty-four to forty-eight hours after an intrav,nou 

 a pure-culture. Long mycelial threads are found in the i 

 organs. They occur on the mucous membrane 

 especially of infants, in greyish-white patches which n 

 epithelium, bacteria, yeast* and the mycelin -us m, 



Saccharomyces pyriformis (Marshall \Sard)- 

 They convert saccharine solutions contain,,,,' 

 beer. They occur with other micro-organisms . 1 



glutini, O,K 

 vl in <le,s, 5 to 11 , long, 4 , -1, to***, -f 



