PLATE V, 



Fig. 1. 



Fig. 2. 



Growth in total darkness and in sunlight. Cultures on the left in each figure were grown 

 in darkness, those on the right in sunlight. Note the zonation present to a marked extent, in 

 the cultures grown in sunlight. 



Fig. 1 — CoIIetotrichum atramentarium. 



Fig. 2 — CoIIetotrichum atrovirens. 



