HISTORY, DISTRIBUTION, MORPHOLOGY. 425 



the body of the parent insect, and propagation is ensured in the 

 offspring. 



In addition to the oval and lemon-shaped cells already 

 described, this fungus produces sausage-shaped growths, as shown 



FIG. 200. Saccharornyccs apiculatus. 

 Abnormal cell forms. Magn. about 950. (After Hansen.) 



in Fig. 200 ; but the external conditions under which these are 

 formed have still to be elucidated, Reess's statement that they 

 appear towards the close of fermentation needing confirmation, 

 since he did not work with pure cultures. No mycelial growth 

 has yet been observed, nor do the cells collect in long aggrega- 

 tions, the daughter cells 

 separating quickly from the 

 parent cells after bending in 

 a peculiar way a pheno- 

 menon that was first de- 

 scribed by REESS (I.). 



As in the case of the true 

 Saccharomycetes, the dimen- 

 sions of the cells vary con- 

 siderably, even in the same 

 culture, some of them 

 measuring 2 /*, whilst others 

 are four times that length. 

 In the majority of instances 

 the length is 7 p, so that the 

 cells are far smaller than those of beer yeasts, as can be seen from 

 Fig. 20 1, where a mixture of Sacch. cerevisice and Sacch. apiculatus 

 is depicted at a magnification of about 950. The first-named can 

 be easily recognised from the greater dimensions and oval shape 

 of the cells. On the other hand, the Apiculatus cells exhibit a 

 feature that is often observed in this fungus, especially when in 



FIG. 201. Cells oi Sacch. apiculatus and 



Sacch. cerevisiae. 

 Magn. about 950. (After Hansen.) 



