MACROFORMATIONS 



U3 



/: COLON ins OF CAULOBACri-RIA 



(7,8) 



The aggregates formed by stalked caulobacteria may consist of small 

 clumps attached to a single point upon the substrate, or of free colonies, in 

 the form of rosettes or ribbons, composed of numerous bacteria joined together 

 bv their stalks. 



Fig. 64 



CHLAMYDOBACTERIAL AGGREGATES 



A group of filaments of the chlamydobacterium Sphaerotilus discophorus. The sheath is 



composed of colloidal ferric hydroxide. The older portions are the thickest and may be 



vacant. The growing filaments protrude from the sheath at the thinner end. (Unstained, 



• 1000). 



Fig. 65 

 CAULOBACTERIAL AGGREGATES 

 A colony of Caulobacter attached to filaments of Sphaerotilus. Each cell has an independent 

 v<ery fine stalk. (Unstained, x 1500). 



