THE CLASSIFICATION OF BACTERIA 295 



CLASS XXI. WITH ENDOSPORES. OBLIGATE ANAEROBIC. RODS 

 BECOMING LATERALLY SWOLLEN OR SPINDLE-SHAPED AT 

 SPORULATION. A FREQUENT VARIATION IN THIS REGARD IS 

 OFTEN NOTED, IN WHICH THE RODS ARE SWOLLEN NEAR 

 ONE END, APPROACHING THE TETANUS TYPE. 



RAUSCHBRAND OR CLOSTRIDIUM GROUP- 

 I. Gelatin liquefied. 



A. Gelatin liquefied slowly, or merely softened by the growth in gelatin 



stab cultures. 



248. B. Feseri (Trevisan) Kitt. 



249. B. anaerobic V and VIII of Sanfelice. 



250. B. botulinus v. Ermengem. 



B. Gelatin liquefied rapidly. 



1. Spores entirely or prevailingly in the centres of the rods, and at 



sporulation swollen in the middle typical clostridium types. 



a. Cultures without a bad, putrid odor. 



* Milk coagulated. 



251. B. butyricus Botkin. 

 ** Milk not coagulated. 



252. B. amylobacter v. Tieghem. 



b. Cultures have a bad, putrid odor. 



253. B.foetidus (Liborius). 



2. Spores prevailingly at the ends of the rods, and at sporulation 



swollen near one end, approaching the tetanus type ; often also 

 swollen near the middle, approaching the clostridium type. 



a. Grow in ordinary nutrient gelatin. 



* Colonies in gelatin or glucose gelatin never radiating fila- 



mentous. 

 f Milk coagulated. 



254. B. Kedrowski. 



ft Milk not coagulated, unchanged in 8 days. 



255. B. cuneatus. 



ftf Milk becomes rapidly translucent transparent, with much 

 gas. 



256. B. sporogenes Klein. 



** Colonies on gelatin radiately filamentous. 



257. B. spinosus Luderitz. 



258. B. cad aver is. 



b. Do not grow in ordinary nutrient gelatin. 



259. B. Weigmanni. 



