DESCRIPTION OF SPECIES. 



545 



Clostridium foetidum (Libo- 

 rius). — Rods 1 fi in width, singly and 

 in filaments. Spore-formation re- 

 sembles that of Bacillus butyricus. 

 They are anaerobic. 



Colonies rapidly liquefy gelatine. 



gas-formation with unpleasant smell 

 and splitting up of the jelly. 



They were isolated from earth. 



Crenothriz Eiilmiana (Raben- 

 horst). — Cocci, rods, and thread- 

 forms. The cocci are globular, 



Pig. 217. — Cladothbix dichotoma. 



A. Branching schizomycete : — (a) Vibrio-form ; (6) SpiriUum-form [slightly mag- 



nified]. 



B. A screw-form with {a) Spirillum-form ; (6) Vibrio-form. 



C. Long spirochaeta-form. 



D. Fragment with spirillum-form at one end, vibrio-form at the other. 



E. Screw-forms ; — (a) continuous ; {b) composed of rods ; (c) composed of cocci. 



F. Spirochaeta-form : — (a) continuous ; (6) composed of long rods ; (c) short rods ; 



{d) cocci (Zopf). 



On agar the colonies form branch- 

 ing processes resembling colonies of 

 Bacillus oedematis maligni. 



Inoculated in the depth of gela- 

 tine liquefaction spreads from be- 

 low upwards. There is abundant 



1 to 6 /i in diam. The threads are 

 colourless, 1'5 to 5 /i thick, and club- 

 shaped at the extremity, reaching 

 a diam. of 6 to 9 fi. The threads 

 form colonies with a brick-red, olive- 

 green, or dark-brown to brown-black 



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