210 



MICRO-ORGANISMS AND FERMENTATION. 



cells, have divided, or after fusion, through the ensuing growth 

 of the spore. 



On wort no film has been observed ; only a slender yeast- 

 ring. 



This species ferments maltose and dextrose, but not saccha- 

 rose ; indeed, the last is not even inverted by it. According to 



FIG. 63. Saccharomyces octosporns. Young vegetation in wort-gelatine 

 (after SCHIOENNING). 



FISCHER, an aqueous extract of the dried, pulverised growth 

 decomposes maltose, but does not exert any influence upon 

 saccharose. 



SACCHAROMYCES COMESII 



was described by CAVARA in 1893. It lives as a parasite or 

 saprophyte on the sheaths or pedicles of millet, and, according to 

 CAVARA, forms a mycelium consisting of cylindrical hyphae 

 with partition-walls ; this mycelium produces cylindrical or 

 longish-ellipsoidal conidia 7-9 /x long and 2-3 p. broad, isolated 

 or linked together. The spores are globular, two to four in 

 each cell. Like Sacch. Ludwigii, this species is propagated by 

 disjunction and not by bud-formation, and the author has 

 observed that fusion also takes place in the germination of 

 spores. 



Saccharomyces (Schizosaccharomyces) Pombe was discovered by 



