FAMILY CORYNEBACTERIACEAE 383 



2. From pneumonia in foals. 



13. Corynebacterium equi. 



III. From insects. Non-motile. 



A. No acid from carbohydrates. Slow liquefaction of gelatin. 



14. Corynebacterium 'paurometabolum. 



IV. Plant pathogens. Non-motile. 



A. Nitrites not produced from nitrates. 



1. Colonies cream-colored. Slow liquefaction of gelatin. 



a. Bluish granules in growth. Attacks alfalfa. 



15. Corynebacterium insidiosuni. 

 aa. No bluish granules. Causes ring rot of potatoes. 



16. Corynebacterium sepedonicum. 



2. Colonies yellow. 



a. No liquefaction of gelatin. Causes a wilt and canker of tomatoes. 



17. Corynebacterium michiganense. 



B. Nitrites produced from nitrates. Slow or no liquefaction of gelatin. 

 1. Colonies yellow. Attack members of the grass family. 



18. Corynebacterium rathayi. 



19. Corynebacterium agropyri. 

 2. Colonies orange. Parasitic on sweet peas, etc. 



20. Corynebacterium fascians. 



V. From soil and water. Liquefaction of gelatin in all cases but sometimes very 



slow (7 weeks). 



A. Acid from glucose. Non-motile. 



1. Nitrites not produced from nitrates. 



21. Corynebacterium helvolum. 



2. Nitrites produced from nitrates. 



a. Cellulose digested. 



22. Corynebacterium fimi. 

 aa. Cellulose not digested. 



23. Corynebacterium iumescens. 



B. No acid from glucose. Some indication of motility in No. 25. 



1. Cells coccoid to short, straight or curved rods. 



24. Corrjnebacterium simplex. 



2. Young cells curved rods in parallel bundles. These may grow out into 



filaments with branching. 



25. Corynebacterium filamentosum. 



1. Corynebacteriiun diphtheriae Bacterium diphtheriae Migula, Syst. d. 



(Flugge) Lehmann and Neumann. {Mi- Bakt., 2, 1900, 499.) From Greek diph- 



crosporon diphthericum Klebs (proto- thera, a piece of leather; M. L., the 



type), Verhandl. d. Congr. f. innere disease diphtheria. 



Med., 2, 1883, 143; die Klebs'schen Common name: Diphtheria bacillus; 



Stabchen, Loffler, Mitteil. a. d. kaiserl. Klebs -Loeffler bacillus. 



Gesundheitsamte, 1884; Bacillus diph- Rods, varying greatly in dimensions, 



theriae Flugge, Die Mikroorganismen, 0.3 to 0.8 by 1.0 to S.O microns, occurring 



2 Aufl., 1886, 225; Pacinia loeffleri singly. The rods are straight or slightly 



Trevisan, I generi e la specie delle Bat- curved, frequently swollen at one or both 



teriacee, 1889, 23; Lehmann and Neu- ends. The rods do not, as a rule, stain 



mann, Bakt. Diag., 1 Aufl., 2, 1896, 350; uniformly with methylene blue but 



