CERTAIN GENERA OF THE CLOSTRrOIACEAE 17 



Tjrpe species M. tenalbus {Bacillus mttltifermentans-lenalbus 

 Stoddard) as described by Stoddard (1915 b). This organism, 

 of which Dr. Stoddard was so kind as to send me a culture, 

 does not fit into any other of the genera here defined. Stoddard's 

 organism ferments glycerol, maltose, lactose, raffinose, glucose, 

 sucrose, inulin, and salicin, JNIannitol and dulcitol are not 

 fermented. 



Adamson describes under the name B. bittyricus a "small or 

 medium-sized" bacillus that ferments glucose, lactose, maltose 

 and sucrose but not mannitol and starch. A butyric acid odor 

 is produced. Perhaps it should be assigned to this group. 



Genus 9. Hiblerillus nov. gen. 



Clostridioideae that do not liquefy gelatin. They do not clot 

 milk. Large gram-positive rods which form more or less re- 

 luctantly long ellipsoid spores ; they may form orgonts. Colonies 

 in deep agar, small and lenticular or with fine radiations. May 

 be pathogenic for the guinea-pig, producing oedema and gas, 

 or paralysis. 



Type species H. sextus {Bacillus VI of von Hibler), as described 

 by von Hibler (resiune by Weinberg and S(5guin, p. 202). 



Von Hibler describes another species which he terms VII. 

 These organisms have much in common and we are probably 

 justified in including them in one genus as Hiblerillus sextus and 

 Hiblerillus septimus. The latter resembles an organism described 

 by Tizzoni and Cattani, according to von Hibler. There are 

 probably many organisms in soil which are pathogenic for rab- 

 bits and guinea-pigs when given certain conditions favorable 

 to invasion, which rarely invade under natural conditions or 

 which on account of shy growth habit are missed when they 

 invade in the company of other organisms. 



To this genus may be assigned two organisms isolated from 

 the intestine of the horse and described by Choukevitch (1911); 

 they possess similar fermentative ability: the production of 

 acid and no gas in glucose agar. A non-pathogenic one, Strep- 

 tobacillus anaerohicus-rectus may be termed H. rectus; another, 

 H. megalosporus , produced a fibrino-purulent peritonitis in a 

 guinea-pig. 



