CERTAIN GENERA OF THE CLOSTRIDIACEAE 23 



The lesions typically produced by organisms of this group were 

 first described by Koch. Gohn and ^Mucha give an elaborate 

 description of an organism which belongs to this genus. Von 

 Hibler studied four strains of "Novy's bacillus." Descriptions 

 of organisms of this type have been given by Kerry, by Rivas 

 and by Diedrichs. Weinberg and Scguin described B. oed-erna- 

 iie?is which is different from A\ maligm but is to be included in 

 this genus. B. bellonensis Saqu^p^e also belongs in this genus, 

 as may also the organism called by Adamson bacillus S (1919, 

 p. 373). I have found a tj^pe that was rapidly fatal to horses, 

 and another different somewhat from all the rest in a septic 

 wound, and hope to define these species accurately in another 

 paper. Wolf (1920) has studied the biochemistry of an organism 

 of this group. 



DEFINITIONS OF CERTAIN GENERA OF THE PUTRIFICOIDEAE* 



Genus 16. Seguinillus nov. gen. 



Putrificoideae that do not exert a marked action on protein. 

 Soften and may blacken meat. jVIilk clotted, may later be 

 digested. Attack a few sugars. Very reluctant to form spores. 

 Minute Gram-positive or Gram-negative rods, uniform in thick- 

 ness but not in length. Spores oval, sub-terminal. Deep colon- 

 ies lenticular or modified lenticular. Occasional tissue invaders 

 which produce a proteolytic gangrene or phlegmon. 



Type species S. aerofoetidus {Bacillus aerofoetidus Weinberg 

 and Seguin) as described by Weinberg and Scguin (p. 161). The 

 organism forms oval subterminal spores. 



These may well be called "borderline" organisms. Henry 

 places them in his " saccharolytic group" on account of their 

 sugar-splitting proclivities. A strain given by me by Weinberg 

 does not grossly attack meat particles. 



Genus 17. Reglillus nov. gen. 



Putrificoideae that show to the eye little proteolytic action 

 on meat. They may or may not blacken it slightly, but the 



* For definition see Jour. Bact., 6, 550. 



