84 SULPHUR BACTERIA 



Rhododiclyon ( Th iodictyoii). 

 Aynoebomonas [Amcebobacter). 

 Rhodothece [Thiothece). 

 Rhodopoly coccus {Thiopoly coccus) . 

 Rhodococcns ( Thiopedia). 

 Lamprocyslis. 

 Rhodocystis (Thiocystis). 

 Rhodocapsa ( Th iocapsa ) . 

 Rhodosarciva {Thiosarcina). 

 Rhodospirilhun [Thiospirillum). 



Family Trichobacteriacece : 



1. Not containing sulphur granules. 



2. Containing sulphur granules. 



a. Beggiaioa. Threads not attached. Motile. 



b. Thiothrix. Threads attached. 



Remarks on Orla Jensen's Classification. 



All the fourteen genera introduced by Winogradsky were 

 accepted, but their names were changed. In addition four 

 new genera were added. The first of these calls for particular 

 attention, because it is a genus composed of cells in which 

 sulphur is not stored. This is Siilphomonas , the name in this 

 system for the thionic acid bacteria, which by this time had 

 been discovered by Nathansohn. Thiophysa volutans appears 

 under the name Thiomonas. The third and fourth genera, 

 namely Thiococciis and Thiospirillum, were added as logical 

 sequences to the insertion of, rod-shaped genera in the family 

 Thiobacteriacecp. The teriri Thiospirillum was not well chosen, 

 as it had already been used by Winogradsky with a different 

 meaning. 



It has already been affirmed that all classifications with 

 pliysiological attributes as the main basis of the grouping 

 cannot be regarded as satisfactory, because bacteria are not 

 confined to only one mode of life. 



