On Certain Bacteria from the Air of New York City. 361 



53. Bacillus ftlSCllS ( Ziiiimermann ) . 



Occuri-ence. (1) "Bacillus clnysogloia " from Krai's laboratory. (2) In the 

 air of the college hallway. (3) A contamination from the air of the col- 

 lege laboratory. 



3IorphoIoffy. Ronnded bacilli, .5-. 7X1-^,") singly or in chains of various 

 lengths; not motile. 



Biology. Nitrate^ not reduced or Imt slightly. Growth characteristically 

 wrinkled with lobed edges, of crusty brittle texture forming a surface skin 

 on liquid media; color light orange. Rosolicacid not changed. Aerobic. 



Remarks. Does not correspond to the description of B. chrysogloia Zopf. 



54. Bacillus fuscus pallidior u. sp. 



Occurrence. " Bacillus latericeus " from Krai's laboratory. 



3Iorphology. Rounded bacilli .5-. 7X1-1- 3,«, singly and in chains. 



Biology. As in No. 53, but the growth is a very pale whitish orange, almost 



pinkish. 

 Eemarks. Does not correspond to B. latericeus Eisenberg. 



55. Bacillus ferrugineus n. sp. 



Occurrence. ( 1 ) A contamination from the air of the college laboratory. (2) 

 From a fresh leaf of Sarracenia purpurea at Plattsburgh, N. Y. 



Morphology. Little rounded bacilli .6X1/', inpairs or chains of various lengths ; 

 not motile. 



Biology. ^luch as in Nos. 53 and 54 but the growth is red, brick red instead 

 of orange ; it is crusty or granular, scarcely wrinkly as the preceding are ; 

 grows slowly. Nitrate not reduced, milk not changed, but an abundant 

 brick-red grow^th forms on the surface. In liroth a coinplete surface skin 

 is not formed. Tlie gelatin colonies under a low power appear like a 

 round tuft of cotton but small and regular. 



56. Bacillus salinoneus n. sp. 



Occurrence. In the air of the college hallway. 



Morphology. Small rounded bacilli, .5X-7/', singly or in short chains, not 



motile. ' . • . 



Biology. A slight reduction of nitrate ; growth on agar narrow, shining, sal- 

 • men pink, quite opaque where thick. No surface growth on broth. 



Deep gelatin colonies rounded, regular, smooth, uncharacteristic. 



57. Bacillus fiuitinius ruber n. sp. 



Deeurrence. ( 1 ) Four times in the air of the college hallway. ( 2 ) In 

 the air on West 59th Street. ( 3 ) " Micrococcus cinnabareus ' ' from the 

 college collection. 



Morpliology. Short rounded bacilli .5X-6-l/^, singly or in chains of three or 

 four, not motile. 



Biology. Nitrate not reduced but in one instance considerably reduced. Re- 

 sembles Nos. 56 and 58 but the color of the growth is reddish pink oj" 

 rather bright red. 



