8 HILDA HEMPL HELLER 



AAA. Highly proteolytic on meat medium for a short period. Produce a gray 

 coloration or a slight blackening of the medium. Sporulate at an 

 early stage and after three days' incubation vegetate very slowly 

 indeed without so digesting the meat particles that they greatly 

 decrease in size. 

 B. Thick rods with oval or oblong spores which are usually central 

 and do not greatly distend the bacillus. 

 C. Resistant saprophytes. Occasionally invade tissue in company 

 with other organisms or alone in debilitated individuals. 



Genus 20. Mariellillus nov. gen. Type 

 species bifermentans (Bacillus hifermen- 

 tans sporogenes Tissier and Martelly) 

 as described by Tissier and Martelly. 

 CC. Delicate parasites. Gram-negative tendency. 



Genus 21. Recordillus nov. gen. Type 

 species fragilis nov. sp. 

 AAAA. Organisms highly proteolytic, producing on three days' incubation in 

 meat medium partial destruction of thrf meat particles which con- 

 tinues on further incubation till the meat particles have greatly 

 diminished in bulk. Coloration of meat usually dark brown or terra- 

 cotta; blackening may or may not take place. 

 B. Slender rods with terminal oval spores. 

 C. Split sugars. 



Genus 22. Tissierilhis nov. gen. Type 

 species paraputrificus (Bacillus para- 

 puirificus defined by Bienstock 1906) as 

 described by Mcintosh under the name 

 of Bacillus putrificus (p. 39). 

 CC. Do not split sugars. 



Genus 23. Putrificus nov. gen. Type spe- 

 cies Bienstocki (Bacillus putrificus Bien- 

 stock) as defined by Bienstock (1906)). 

 BB. Heavy rods with subterminal or median oval spores. 



C. Do not produce balls of amino-acid crystals to a striking 

 degree. 

 D. Not so highly proteolytic as organisms of following 

 groups. Meat particles not much decreased in 

 size, spores often larger, and more nearlj' spherical 

 than in following genera. Isolated colonies in 

 deep agar usually, but not always, large, smooth 

 lenticular or modified lenticular structures that do 

 not become woolly. Typically produce a power- 

 ful neuro-toxin. 



Genus 24. Ermengemillus, nov. gen. Type 

 species bohdtJius (Bacillus bolulinus van 

 Ermengem) as described by Meyer and 

 co-workers in a future paper. 



