B 





1.0pm 



1.0pm 



Figure 4. Electron micrographs of vestimentif eran tube surfaces 

 from Plume Vent. (A) SEM photo of tube surface with light 

 colonization by sheathed bacteria; (B) TEM photo showing 

 iron particle (P) accumulation in sheath of bacterium (B) 

 attached to tube surface ( T ) ; and (C) Extensive iron 

 particle (P) accumulation in extracellular matrix around 

 bacterium (B) on tube surface (T). 



104 



