SCHIZOM YCETES 



453 



Fig. -iZ-i.—Beggiatoa alba Trev. i, group ol filaments. 2 — 5, filaments of varying thickness, 5 

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

 segmentation is indistinct. 6—8, 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, motile spores, (i x 540, other figures 

 X goQ.) (After Zopf.) 



