230 FAMILY OF SACCHAROMYCETACEAF 



giant colonies, numerous ascospores are noticed. This yeast ferments 

 dextrose, levulose, and maltose but does not act on saccharose, lac- 

 tose, or d-galactose. 



SACCHAROMYCES COMESII. Cavara 



This species was described in 1893 by Cavara. 1 It grows parasit- 

 ically and saprophytically in the panicles and stalks of millet. Cavara 

 described ascs enclosing a varied number of ascospores. These asco- 

 spores fuse into one at the moment of their germination. Germina- 

 tion is accomplished as with Saccharomyces Ludwigii by the forma- 

 tion of a germinating tube. Guilliermond 2 has shown from the 

 illustrations presented by Cavara, that this species is probably not 

 yeast but probably a Dematium. Cavara regarded it as a yeast on 

 account of the incorrect interpretation of forms in its development. 

 Saccharomyces comesii is, then, not a yeast and should not be included 

 in the family of Saccharomycetes. . 



Genus VIII. Saccharomycopsis (Schionning) 

 Ascospores in two membranes germinating by budding. 



SACCHAROMYCOPSIS GUTTULATUS (Robin) Schionning 



Syn. SACCHAROMYCES GUTTULATUS. Winter. CRYPTOCOCCUS 



GUTTULATUS. Robin 

 This species was discovered by Remarck and Robin and studied 



later b^ Buscalioni, 3 Casagrandi and Wilhelmi. 4 It seems to live as a 



true parasite in the intestinal canal 

 of certain animals (birds, reptiles 

 and mammals). It swarms in the 

 intestinal canal of the rabbit, less 

 frequent in guinea pigs, and ap- 

 pears in the excrement of these 

 animals. Saccharomyces guttulatus 



Fig. "--S aUUUlaiUS Presses large cells, oval or more 



or less rectangular, resembling the 



oidia of Oidium lactis. The cells contain a large amount of glycogen 



and are often united in groups at their ends. (Fig. 97.) Budding 



1 Cavara. Sur un microorganisme zymogene de la Dourra. Revue mycolo- 

 gique, 1893. 



2 Guilliermond, A. Observations sur la germination des spores du S. Lud- 

 wigii. Bull, de la Societe de Mycologie, 19, 1903. 



3 Buscalioni, L. Saccharomyces guttulatus. Giornale Malphigia, 10, 1896. 



4 Wilhelmi, A. Beitrage zur Kenntniss des Saccharomyces guttulatus. (Bus- 

 calioni) Inaugural dissertation. Bern. Cent. Bakt. 4, 1898. 



