THE CLASSIFICATION OF BACTERIA 291 



236. B. sublanatus Wright: I.c. 



Morphology. Bacilli of medium size ; ends rounded ; occur in pairs and in 

 long forms. 



Gelatin colonies. Deep colonies : round, brownish, granular, entire. Surface 

 colonies: in two days, 1-2 mm., round grayish disks. Microscopically, 

 granular, dense toward centre, margins more translucent and sharp. In 

 3 days, the colonies are crateriform; centres yellowish white, borders 

 ciliate. 



Gelatin stab. Slight growth in depth ; on the surface, a napiform to stratiform 

 liquefaction, with a white pellicle on the surface. 



Agar slant. Growth a translucent thin grayish narrow stripe. 



Bouillon. Turbid ; the medium becomes greenish in tint. 



Potato. Growth brownish, thin, granular, moist, spreading. 



Litmus milk. Not coagulated, decolorized, alkaline, slowly peptonized. 



Glucose bouillon. No gas. Indol slight or doubtful. Grow at 36°. 



Habitat. Water. 



237. B. lacteus 



B. lactis No. 12 Fffigge : Zeitsch. f. Hygiene, XVII, 1894. 



Morphology. Bacilli thin, slender. 

 Gelatin colonies. None visible after 2 days. 



Gelatin stab. In 2-3 days, a faint development, and the beginning of lique- 

 faction. 

 Agar slant. Growth white-gray, slimy. 



Bouillon. A thin membrane on the surface, with flocculi in the medium. 

 Potato. Growth thin, limited, moist, becoming thick, yellowish. 

 Milk. At 37°, slowly peptonized, becoming bitter and toxic. 

 Habitat. Milk. 



238. B. putrificus Fliigge 



B. am Faces IV Bienstock : Zeitsch. f. klin. Med., VIII. 

 B. futrificus-coli Fliigge : Die Milcroorganismen, 1886. 



Morphology. Bacilli slender, delicate, also as filaments. On gelatin, a 



mother-of-pearl growth, becoming yellowish. Decomposes fibrin. 

 Habitat. Faeces. 



