720 ADDITIONAL SPECIES OF 



456. BACTERIUM URE^E (Jaksch). 



Found in ammoniacal urine. 



Morphology. Bacilli with round ends, about 2 M long and 1 M thick. 



Biological Characters. An aerobic and facultative anaerobic, non- 

 liquefying bacillus. Spore formation riot observed. Grows very slowly at 

 the room temperature. Changes urea into carbonate of ammonia. Upon 

 gelatin plates forms small, almost transparent colonies, which at the end of 

 ten days may have the diameter of a " pfennig." In gelatin stick cultures 

 a thin, gray, branching growth is seen along the line of puncture. Old 

 cultures have the odor of herring-brine. Imperfectly described. 



457. SARCINA MOBILIS (Maurea). 



Obtained by Maurea (1892) from ascitic fluid which had been preserved 

 a long time in a test tube. 



Morphology. Micrococci having a diameter of 1.5 /* and associated in 

 pairs or in tetrads. 



Stains with the usual aniline colors and also by Gram's method. 



Biological Characters. An aerobic, liquefying, motile, chromogenic 

 sarcina. Does not grow in the incubating oven at 37 C. Motions progres- 

 sive, serpentine, or rotatory (?). Upon gelatin plates, at 15 to 20 C., puncti- 

 form, white colonies are seen on the third day. By the seventh day lique- 

 faction of the gelatin commences around the colonies and a brick-red pig- 

 ment is formed. In gelatin stick cultures, at the end of five days, a scanty 

 development is seen along the line of puncture and a more abundant growth 

 upon the surface ; later the surface growth acquires a brick-red color ; in 

 from fifteen to twenty days liquefaction has occurred in the form of a small 

 funnel, and by the end of thirty days one-half of the contents of the tube is 

 liquefied. In bouillon the fluid becomes clouded in two or three days, and 

 later a yellowish-red deposit is seen at the bottom of the tube. In agar 

 stick cultures a whitish layer is developed on the surface, which later ac- 

 quires a brick-red color. In milk growth occurs without producing coagu- 

 lation. No growth upon potato. In hay infusion sarcina-like packets are 

 developed in abundance, as well as tetrads and diplococci. 



458. BACILLUS STOLONIFERUS (Pohl). 



Obtained from swamp water (1892). 



Morphology. Bacilli 1.2 ^ long and 0.8 fi broad. 



Biological Characters. An aerobic, liquefying, motile bacillus. Spore 

 formation not observed. In gelatin stick cultures liquefaction, in funnel 

 form, commences at the end of twenty-four hours and progresses rap- 

 idly. Upon the surface of agar a thick, white mass develops along the 

 track of the inoculating needle. Upon potato small colonies the size of a 

 pin's head are developed along the line of inoculation and extend over the 

 entire surface. In milk a scanty development occurs ; the milk is not coagu- 

 lated and no acid is formed. 



459. BACILLUS INCANUS (Pohl). 



Obtained from swamp water. 



Morphology. Bacilli 1.7 n long and 0.4 n broad. 



Biological Characters. An aerobic, liquefying, slightly motile bacillus, 

 In gelatin stick cultures growth occurs along the line of puncture and upon 

 the surface as a grayish-white, elevated mass. At the end of forty-eight 

 hours slight liquefaction is observed ; this progresses very slowly. Upon the 

 surface of agar a grayish-white, granular mass is developed along the track 

 of the inoculating needle. Upon potato a gray, viscid layer is formed, which 



