VIBRIOS IN WATER. 



409 



of an extensive epidemic of cholerine in Lisbon, in which, 

 however, but a single death occurred. On gelatin-plates cir- 



v *;o^v 

 v v=n>w* 

 \ ,* , j fr .<, *', 1 



r >//^; N^t^ 

 ^ r v^ j .^ v 



C'r> 1 ^? -^v^ 



<^!#fe 





Fig. 90. Spirillum Metschnikoff, from an agar-agar culture; X 1000 (Itzerott and 



Niemann). 



Fig. 91. Spirillum Metschnikoff; stab-culture in gelatin forty-eight hours old 

 (Frankel and Pfeiffer). 



cular, sharply circumscribed, whitish-yellow colonies form that 

 cause little liquefaction. The culture does not yield the nitroso- 

 indol reaction. 



