XIIL] SPIROBACTERIUM. 187 



or rosy colour. 1 It is motile, and forms a kind of 

 zoogloea, the individuals being closely placed and there- 

 fore producing a rosy colour of a more decided tint. Where 

 they form continuous masses,, the naked eye can detect the 

 rosy tint. 



FIG. in. BLOOD OF APE INOCULATED WITH BLOOD SHOWN IN PRECEDING 

 FIGURE. 



Blood-corpuscles and spirilla. 

 Magnifying power 700. (After Koch.) 



(b) Spirillum sanguineum (Ophidomonas sanguinea Ehren- 

 berg). This was observed by Cohn and Warming 2 in 

 pondvvater. Morphologically it is identical with spirillum 

 volutans. It is motile, with a flagellum either at one 



1 " On a Rose-coloured Spirillum," Quar. Journ. of Micr. Set'., vol. 

 xv. New Series. 



' 2 Btitr. z. Biol. d. PJJanzen, vol. i. 



