MOULDS 11 



of the hyphae covered with a variable number of spore- 

 carriers, or stcriymata, from the extremities of which the 

 spores divide off in rows (fig. 3) . 



The hyphae of the pcmnlliacca (pencil-moulds) are 

 branched, which is not the case with the mucor and asper- 



Gronp of buds 

 (gemmation) 



Mother-cell 



Vacuole 



FIG. 6. YEAST CKLLS (Sacefiaromycet Cerevitut). Magnified 900 times. 



gillus varieties, and on the terminal twigs of the tuft so 

 formed (the basidia) are seen the sterigmata, from which 

 the spores, or mnidia, are separated off in the form of 

 chains (fig. 4). 



Arthrosporus 



1.1 



SinirN- segments 



sheath sur- 

 rounding the sepa- 

 rate spores 



FIG. 7. CKKXOTJU.F. KDIXIAXA. MaLMiificd COO times. (After Zopf.) 



The oidiaccfc are distinguished by the fact that the 

 hyphae form no special spore -bear ing organs, but become 

 articulated at their extremities, and so divide off the spores 

 in the form of segments. 



