MOULDS 



11 



of the hyphae covered with a variable number of spore- 

 carriers, or sterigmata, from the extremities of which the 

 spores divide off in rows (fig. 3) . 



The hyphae of the pcnicilliacece (pencil-moulds) are 

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



G-roup of buds - 

 (gemmation) 



Mother- cell ^ ^ 



- Vacuole 



FIG. 6. YEAST CELLS (Saccharomyces Cerevisice). 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 conidia, are separated off in the form of 

 chains (fig. 4). 



Arthrosporus 



- Single segments 



Common sheath sur- 

 rounding the sepa- 

 rate spores 



Fia. 7. CBEXOTHI^E KUIIMAXA. Magnified 600 times. (After Zopf.) 



The oidiacea are distinguished by the fact that the 

 hyphse form no special spore-bearing organs, but become 

 articulated at their extremities, and so divide off the spores 

 in the form of segments. 



