XIIL] SPIROBACTERIUM. 187 



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

 zooglcea, 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. 



r \ 



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 sanguined Ehren- 

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

 pondwater. 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. Sci., vol. 

 xv. New Series. 



' 2 Bcitr. z. Biol. d. PJIanzen, vol. i. 



