360 On Certain Bacteria from the Air of Neio York City. 



,^ 48. Bacillus primus Fullesi n. sp. 



Occurrence. In a leaf of Sarmcoiia purpurea at Plattsburgh, N. Y. 

 3Iorph<)Jogy. Small rounded liacilli, sinjily aud in pairs, do not form long 



chains; .5-.6X-8-l/i, actively motile, but becoming much less so in old 



cultures (twenty -five days). 

 Biology. Nitrate reduced, at length completely, rosalic acid not changed ; the 



cultures in milk emit a disagreeable odor. 

 Remarks. The Bacillus No. I., of Fulles, seems to corresj)ond. 



49. Bacillus diplitlieriae (Klebs). 



Occurrence. From the college colllection. 



3forpholof/y. Short bacilli, nearly spherical, irregular; .8X1/" (grown at 



room temperatiire ) . 

 Biology. Grows very poorly at room temperature so that the characters are 



not all reliable. Nitrate well reduced in twenty-eight days but not 



completely. 



50. Bacilus erytlirosporous (Eidam). 



Oecurence. From the college collection. 



3IorplioJogy. Rounded bacilli, .6X1-1-5 «, singly or in short chains; motile, 

 form spores. 



Biology. A slight trace of reduction of nitrate; rosalic acid decolorized; lac- 

 tose-litmus made blue at first, but in sixty days the color becomes purple, 

 and in one hundred days bright red. Growtli on agar translircent white, 

 a green fluorescence in the medium. 



51. Bacillus lluorescens putidus (Fliigge). 



Occurrence. (1) From the college collection. (2) From Krai's laboratory at 

 Prague. (3) In the exudation from the anus of some sick lepidopterous 

 larvie (Clisioeampa fragilis) bred in confinement. 



3Iorphology. Rounded bacilli, .6-.8X1-2m, singly or in short chains, activelj' 

 motile. 



Biology. Nitrate not reduced, rosalic acid not changed ; lactose-litmus blue at 

 first but begins to redden in sixty to ninety days. The reddening- 

 became most pronounced in culture ( 3 ). Agar growth translucent white 

 Avith a green fluorescence in the medium. 



o*- 



52. Bacillus lluorescens aureus (Zimmermann). 



Occurrence. From the college collection. 



3Iorphology. Large, rather slender bacilli, .7-lXl-5,«, singly or in chains; 

 sposmodically motile, the longer chains T)ending at the joints. 



Biology. As above, but the growth is yellow. The description says ocherous 

 or golden yellow, but the culture before me has become a very pale yel- 

 low. No sign of reddening of lactose-litmus in forty-five days. 



