292 



FAMILY OF SACCHAROMYCETACEAE 



Fig. 138-B. Arthro- 

 spore Formation in 

 Nematospora Lyco- 

 persici. 



B. (after Sc 



by apico-lateral budding at cell unions. The ellip- 

 tical and ovoid cells alone are gametic in func- 

 tion." Apparently this yeast is a parasite on the 

 ripe fruit of Lycopersicum esculentum. 



Genus XV. Coccidiascus. Chatton 



Budding cells, ascs seem to be derived from 

 an isogamic copulation with eight ascospores. 



COCCIDIASCUS LEGERI. Chatton 1 



This yeast was observed in a Muscide Droso- 

 phila funebris. The yeast infects the cells of the 

 middle intestine and lives in the vacuoles of the 

 cells in which it multiplies by ordinary budding 

 Budding consti- 



ider). 



and also by ascs. 



tutes the intracellular multiplication 

 while ascs are the external agents of 

 propagation. The parasite possesses 

 the form of a yeast and never pro- 

 duces a mycelium. Formation of 

 ascs seems to be preceded by an 

 isogamic copulation. The ascs have 

 the shape of bananas. They contain 



8,1 i i f 



aSCOSpOreS, the Special Shape 01 



which makes this yeast resemble 

 Monospora cuspidata and Nematospora coryli. 



Fig. 138-C. Coccidiascus Legeri. 



1, Vegetative cells. 2, Copulation. 3, Ascs. 

 4, Ascospores Detached from Asc. 5-6, As- 

 cospores (after Chatton). 



1 Chatton. Coccidiascus Legeri. nov. gen. n. sp. Levure ascospore parasite 

 de cellule intestinale de Drosophila funebris. Comp. Rend. Soc. Biol. 75, 1913. 



