PART II STUDY OF SPECIES 



CHAPTER X 

 FAMILY OF SACCHAROMYCETACEAE 



UNICELLULAR fungi, multiplying by budding or transverse 

 division and forming ascs. Each cell has the ability to change 

 into an asc and form from one up to twelve ascospores, each 

 ascospore germinating and forming a vegetative cell. 



FIRST GROUP 

 Genus I. Schizosaccharomyces 



Round or rectangular cells, dividing by transverse partition. Asc 

 with 4 or 8 ascospores ordinarily resulting from isogamic copula- 

 tion. 



SCHIZOSACCHAROMYCES OCTOSPORUS. Beijerinck l 



This species was found by Beijerinck on fruits from warm climates 

 (raisins from Corinth, Greece, Asia Minor, and Turkey, and figs from 

 Smyrna). It possesses large cells of various shapes; some are rectan- 

 gular, resembling the oidia of Endomyces or giant bacteria; others are 

 spherical and resemble the Micrococcus (Figs. 8 and 14). The rec- 

 tangular cells predominate in young cultures, while the spherical cells 

 appear especially when multiplication commences, and change into 

 an asporogenic type. 



Often the cells near the ends show the presence of circular lines 

 which mark the divisions between the old part of the cell wall and that 

 which was newly formed. 



Multiplication is brought about by transverse division: a wall 

 appears in the middle of the cell, making two daughter cells. The 

 wall quickly increases in size and the two cells become round in shape. 

 The cells may remain attached in such a way that the mother cell 

 may have 4 or more daughter cells attached. The daughter cells 

 may undergo a transverse partition without separating from the 

 mother cell. The cells are then grouped somewhat in the same way 

 as the Sartina. 



Sch. octosporus never contains glycogen at any time of its de- 



1 Beijerinck, W. Sch. octosporus. Cent. Bakt. 16, 1896, also 1897. 



197 



