28 AGEICULTUEAL AND INDUSTRIAL BACTEEIOLOGY 



GG. Not securing growth energy ex- 

 clusively by the aerobic oxidation 

 of carbon compounds. 



I. Usually producing a fluores- 

 cent pigment. Usually motile 



by polar flagella Pseudomonas. 



II. Without fluorescent pigment. 

 Motile or nonmotile, if the for- 

 mer, flagella peritrichous. 



J. Rods of irregular shape, 

 sometimes clubbed or branched. 

 Nonmotile animal parasites. 

 K. Gram-positive rods, fre- 

 quently granular or clubbed. Corynebaeterium. 

 KK. Gram-negative, rods some- 

 times elongated or branched. 



Not granular Pfeifferella. 



JJ. Rods relatively regular, and 



staining evenly or bipolar. 



Motile or nonmotile. 



K. Usually showing bipolar 



staining. Weak power of 



fermentation Pasteurella. 



KK. Bipolar staining absent. 

 L. Growing only or best in 



presence of hemoglobin. Hemophilus. 

 LL. Not requiring hemoglo- 

 bin. 



M. Saprophytic red or 

 violet forms. 



N. Pigment red. Erythrobacillus. 



NN. Pigment violet. .. Chromobacterium. 

 MM. Without red or vio- 

 let pigment. 

 N. Gram-positive lactic 



acid bacteria Lactobacillus. 



NN. Gram-negative. 

 O. Producing plant 



diseases Erwinia. 



OO. Not producing 

 plant diseases. 

 P. Rods not uni- 

 form. Ferment 

 sucrose not lac- 

 tose Proteus. 



PP. Rods uniform. 

 Never ferment 

 sucrose except 

 that lactose is 

 also fermented. Bacterium. 

 CC. Rods curved. 



D. bhort, comma-shaped Vibrio. 



DD. Longer, spiral Spirillum. 



