170 



MICRO-ORGANISMS AND FERMENTATION. 



Streak cultures of this species in gelatine yeast-iuater 

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

 hairy edges. 



SACCHAROMYCES ELLIPSOIDEUS I. HANSEN. 

 (Figs. 43, 44.) 



Bottom-fermentation yeast. 



Sedimentary forms grown in wort : mostly oval and round 

 cells ; sausage-shaped cells rare (Fig. 43). 



FIG. 43. 



Saccharomyces ellipsoideus I. Hansen. Cell-forms of young sedimentary 

 yeast, after Harisen. 



Occurs on the surface of ripe grapes. 

 Ascospore-formation (Fig. 32, 5) : 

 At 32'5 C. no ascospores are developed. 



3O5 31*5 the first indications are seen after 36 hours. 



23 



29.5 

 25 



18 

 15 

 10-5 

 7-5 



4 no ascospores are developed. 

 Size of the spores 24 /*. 



21 

 33 

 45 

 4 J days. 



11 



