FAMILY PARVOBACTERIACEAE 565 



bb. Gelatin not liquefied. 



c. No acid from lactose and maltose. 



6. Bacteroides varius. 

 cc. Acid from lactose and maltose. 



d. Acid from sucrose. No acid from glycerol. 



7. Bacteroides inaequalis. 

 dd. No acid from sucrose. Acid from glycerol. 



8. Bacteroides insolitus. 

 B. No gas formed from proteins. 



1. Indole not formed. 



a. Hydrogen sulfide not formed, 

 b. No acid from lactose. 



9. Bacteroides vescus. 

 bb. Acid from lactose. 



c. No acid from salicin. 



10. Bacteroides exiguus. 

 cc. Acid from salicin. 



11. Bacteroides uncatus. 

 aa. Hydrogen sulfide formed. 



b. No acid from salicin. Acid from arabinose. 

 c. Gelatin liquefied. 



12. Bacteroides vulgatus. 

 cc. Gelatin not liquefied. 



13. Bacteroides incommunis. 

 bb. Acid from salicin. No acid from arabinose. 



14. Bacteroides distasonis. 

 bbb. No acid from salicin or arabinose. 



c. Acid from sorbitol. 



15. Bacteroides tumidus. 

 cc. No acid from sorbitol. 



16. Bacteroides convexus. 



2. Indole formed. 



a. No acid from salicin or arabinose. 



17. Bacteroides ovatus. 

 aa. Acid from salicin and arabinose. 



b. No acid from mannitol. 



c. No acid from rhamnose. 



18. Bacteroides uniformis. 

 cc. Acid from rhamnose. 



d. Not capsulated. 



19. Bacteroides thetaiotaomicron. 



dd. Capsulated. 

 bb. Acid from mannitol. 



II. Requiring an enriched medium. 



A. Producing a black pigment. 



B. Not producing pigment. 



20. Bacteroides variabilis. 



21. Bacteroides gulosus. 



22. Bacteroides melaninogenicus. 



23. Bacteroides caviae. 



