On Certain Bacteria from the Air of Neio York City. 35T 



a green fluorescence in the medium. Lactose-litmus is reddened rather 

 slowly, but ultimately completely. 

 Benmrks. From the description, this culture can he referred to either B. 

 fluorescens tenuis Zimmerman, B. virescens Frick, or B- dentftlis riridaiis 

 Miller. The " Bacillus of Lesage " (green dian'ha^a) is said to produce 

 slow liquefactiou. It differs from No. 41 only iu that nitrate is not re- 

 duced. 



36. Bacillus sai'raceiiicolus u. sp. 



Occurrence. In afresh leaf of the pitcher i)lant {Sarracenio purxmrea) at 

 Plattsburgh, N. Y., in June. 



3IofphoJofjii. Small l)acilli, surrounded hy clear spaces in the stained prepa- 

 ration, not motile; in pairs, short chains or singly; size about .5X1/^- 



Biolof/i/. Growth on agar, white, faintly tinged with brownish, spreading; 

 when old, almost ocherous; on lactose-litmus gelatin the growth spreads 

 out into long lobes, the litmus is reddened, but the color begins to dis- 

 appear in forty days, and the medium is purple or bluish in ninety days., 



37. Bacillus vacuolatus u. sp. 



Occurrence. Two cultures from a trap of the carnivorous water plant Utricti- 

 latriu rulgaris from Dead Creek, Plattsburgh, N. Y., in Septemljer. 



3Iorphohnj)i. Large liacilli Aarying greatly in length, about 1 /^ wide and 1-5 ,« 

 long, the ends rounded; the contents are curiously vacuolated both iu 

 fresh and old cultures, so that the bacilli stain irregularly, l>ut usually 

 Avell at the ends; singly or in short chains; usually not motile, biit occa- 

 sionally spasmotlically so. Looks like the figure of Baccihis hticcalis 

 ma.vhnus, Miller. 



Biology. On agar shining, soft trauslucent white. Lactose-litmus gelatin is 

 reddened, but in about sixty days this color begins to be replaced by blue 

 Avhich gradually increases, though the red ^\as still visible at the apex of 

 the slant in ninety days. 



38. Bacillus ureae (Jaksch). 



Occurrence. (1) "Bacillus ureje " from Krai's laboratory. (2) "Bacillus 

 pyogenes foetidus " from Krai's laboratory. 



3Iorphology. Short rounded bacilli .7-1X1-2//, not motile, singly or in short 

 chains. 



Biology. Nitrate i>artially reduced, tlie test giving a moderate color; milk 

 coagulated in (2) only on boiling. Growth on agar, broad shining sordid 

 white, not very opaciue; no surface gro\\-th on broth; rosolic acid un- 

 changed. A considerable amount of indol is formed in ]ieptone-siilt 

 broth. 



Jlemarks. Appears not to be contradicted by the description of Bccterium ureae 

 of Jaksch. Comes near liticillns uhiquifus .Jordan, but possesses much 

 less power of reducing nitrate. 



