GENERAL SYSTEMATIC BACTERIOLOGY 103 



EE. Gram-negative, may contain Gram-positive granules. 

 Form smooth lenticular or modified lenticular colonies 

 in deep agar. Typically pathogenic for cattle, sheep, 

 and guinea-pigs. 



Genus 13. Arloingillus nov. gen. Type 



species Chauvoei (Bacterium Chauvoei 



Arloing, Cornevin and Thomas) as 



described in a future paper. 



AA. Produce HjS demonstrable by a lead-acetate-paper test when grown in blood 



broth. 



B. Produce a large amount of gas from carbohydrates. Heavy Gram- 

 positive rods with little or no tendencj^ to sporulation. 



Genus 14. Meyerillus nov. gen. Tjrpe 

 species sadowa nov. sp. to be described 

 in a future paper. 

 BB. Produce less gas from carbohydrates. Heavy Gram-positive or Gram- 

 negative rods that form oval spores that are usually subterminal 



Genus 15. Novillus nov. gen. Type 

 species maligni (Bacillus oedematis 

 maligni II. Novy) as described by 

 Novy. 



A committee of the Society of American Bacteriologists (Bergey, 

 Breed, Hammer, Harrison and Huntoon) have recently (1923) prepared 

 a Manual of Determinative Bacteriology. In general, the classification 

 suggested by Winslow et al. has been followed. In some groups genera 

 have been added, and several new families created. In the treatment of 

 the Bacteriaceae they have followed Castellani and Chalmers and in 

 orders other than Euhacteriales they have followed Buchanan. The 

 keys for differentiation of orders, families and genera follow. 



The Classification of Bacteria according to Bergey et al. (1923) 

 Key to the Orders of the Class Schizomycetes 



1. Simple and undifferentiated forms, the true bacteria. 



Euhacteriales 



2. Specialized or differentiated forms. 



a. Plant like. 



b. Mold like Actinomycetales 



bb. Not mold like. 



c. Sheathed Chlamydobacteriales 



cc. Not sheathed. 



d. Sulphur bacteria Thiobacteriales 



dd. Slime-mold like Myxomycetales* 



aa. Protozoan like Spirochaetales 



* A misprint for Myxobacteriales. 



