AEROBIC SPORE-BEARING NON- PATHOGENIC BACTERIA 531 



Group VIII. Cylindrical terminal spared group 



Small thin actively motile organisms measuring 0.375 to 0.5 

 by 2.5 to 4 microns. Slightly larger on glucose agar but no 

 change in character of protoplasm. Spores terminal, cylindri- 

 cal, measuring usually 0.75 by 1.125 to 1.5 microns. 

 Represented by 



Bacillus circulans Jordan. 

 Bacillus hrevis Migula. 

 Bacillus terminalis Migula. 



Group IX. Central spored group 



Long, actively motile organisms with pointed ends measuring 

 0.375 to 0.5 by 1.125 to 4 microns. Slightly larger on glucose 

 agar, but no change in character of protoplasm. Spores de- 

 velop in the middle of the rods which become spindle-shaped. 

 Spores large cylindrical measuring 0.625 to 0.875 by 1.125 to 

 1.5 microns. 



Bacillus centrosporus nov. sp. 



Bacillus laterosporus nov. sp. 



bibliography 



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