SCHIZOMYCETES 



453 



FIG. 381. Bcggiatoa alba Trev. i, group ol filaments. 2 5, filaments of varying thickness, 5 

 breaking up ; small dark circles in all cases grains of sulphur ; where such are abundant transverse 

 segmentation is indistinct. 68, filaments rich in sulphur showing transverse segmentation after 

 treatment with solution of methyl violet ; in 8 longitudinal division is shown (formation of cocci or 

 spores). 9, filaments which have broken up into spores. 10, mottle spores, (i x 540, other figures 

 x 900.) (After Zopf.) 



