SACCH. ELLIPSOIDEUS I. 



351 



Microscopic appearance of the cells in the films : 



At 20 to 28 C. : Almost the same forms as in the sedi- 

 mentary yeast. 



At 15 to 3 C. : Strongly-developed colonies of elongated, 

 sausage-shaped or thread-like cells, which closely resemble a 

 mycelium in appearance (Fig. 73). 



In old cultures of films, the cells have the same forms 

 as at 15 to 3 C., but are often still thinner and more thread- 

 like. 



Fig. 73. Saccharomyces Pastorianus 111. (Hansen). Film -forms at 15 to 3 C. (after HunseiiV 



Streak cultures of this species in yeast-water gelatine, after 

 sixteen days at 15 C., give growths with distinctly hairy 

 outline. 



Saccharomyces ellipsoideus or Saccharomyces ellipsoideus I. 

 Hansen. (Figs. 74, 75.) 



Bottom-fermentation yeast. 



Sedimentary forms grown in wort : Mostly oval and round 

 cells ; sausage-shaped cells are rare (Fig. 74). 



If this species is cultivated in wort near the maximum 

 temperature for growth, the vegetation consists of round and 

 oval cells. The temperature limits for budding in wort are 

 40 to 41 C. and 0-5 C. Saccharose, dextrose, Isevulose, and 

 maltose are fermented, but not lactose. 



Occurs on the surface of ripe grapes. 



