326 BACTERIOLOGY 



Gelatin stab. Surface growth elevated, glistening, light green ; the medium 

 becomes blue green, fluorescent. Grow in acid gelatin ; no fluorescence. 



Agar slant. Growth translucent, moist, glistening, light greenish ; agar be- 

 comes greenish. 



Boitillon. Turbid, greenish. 



Potato. Growth pale brown, spreading. 



Litmus milk. Not coagulated, alkaline ; color deepened. 



Glucose bouillon. No gas. Indol doubtful. At 36° little or no growth. 



Habitat. Water. 



38. Ps. erythrospora (Cohn) Migula 



B. erythrosporus Cohn : Beitrage Biol., Ill, 1879, Heft I, 128. 

 Ps. erythrospora Migula: Die Naturlichen Pflanzenfam., i8g6. 



Morphology. Bacilli slender threads. Cultures at 20° show in every rod 2-8 

 reddish ovoid granules. Flagella polar, in bundles of 3-6. 



Gelatin colonies. Deep: lobed, undulately channelled, with a green fluores- 

 cence. Surface: round — irregular, brownish, with a faint radial striping. 



Gelatin stab. In depth, a uniform growth ; surface growth flat. 



Potato. Growth slightly spreading, reddish — nut-brown. 



Habitat. Isolated from flesh infusion, and from water. 



39. Ps. putida (Flugge) Migula 



B. fluorescens-putidus Flugge. 



Morphology. Bacilli, small, short, ends rounded. 



Gelatin colonies. Deep: very small, dark. Surface: round, strongly refract- 

 ing, yellowish ; borders bright gray, finely granular. Later with erose- 

 lobate borders, with a greenish shimmer. 



Gelatin stab. In depth, a weak, gray, milky turbidity ; surface growth spread- 

 ing ; a greenish coloration of the gelatin ; not liquefied. 



Potato. Growth thin, grayish-brownish. In putrefying solutions, an odor 

 of trimethylamin. 



Habitat. Isolated "from putrefying substances, water, etc. 



CLASS V. WITH ENDOSPORES. 



I. Aerobic and facultative anaerobic. 

 A. Non-chromogenic. 



1 . Rods not swollen at sporulation. B. subtilis type. 



40. Ps. rosea (Bordas). 



2. Rods swollen at one end at sporulation. Tetanus type. 



41. Ps. Tromelschldgel {Kz.ve.nt\). 



