On Certain Bacteria from the Air of New York City. 369 



80. Bacilliifii violaceiis saccliari (Ager).* 



Occnrrcncr. In the aiu of the college j^anl. 



Jlorplidhifj!/. Short bacilli .oX-^-l/', singly or in short chains, actively motile. 



Rioiofiy. Gelatin qnickly liquefied, milk coagulated, rosolic acid faded. Pro- 

 duces a green fluorescence and also a ])lackish color in the presence of 

 glucose, lactose, glycerine and iu some samples of broth, also on the addi- 

 tion of formaline. 



Remnrkft. Differs from No. 75 in producing the violaceus black pigment. This 

 is very well marked in old cultures in milk. 



81. Bacillus Hudsouii n. sp. 



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

 the air of the laboratory. (3) Twice iu the air of the college yard. (4) 

 A culture obtained by Prof. G. H. Hudson at Plattsburgh, N. Y. 



3Iorpliolof/i/. Small rounded bacilli, .5-. 6 K. 7-1. 5 fj., singly or in pairs; motile. 



Biolof/i/. Gelatin quickly liquefied, milk coagulated after 14 days, finally 

 forming a distinct curd which is sometimes dissolved. Nitrate not re- 

 duced or very slightly ; rosolic acid not changed. On potato the growth 

 is thin, translucent ocherous or orange tinted. The amount of redden- 

 ing of lactose-litmus varied somewhat iu the different cultures. On 

 glycerine agar an abundant growth is formed, thick, l)ut translucent or 

 of a mustard color, while a considerable accumulation of orange jyig- 

 ment collects in the condensation water in the bottom. 



82. Bacillus oxylacticiis n. sp.? 

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



the air of tlie college yard. 

 Morpholofin. Kather large bacilli 1-1. 3X1- 7-2.5 /i, singly or in long chains ; 



not motile. 

 Bioloffij. Gelatin quickly liquefied, nitrate not reduced, rosolic acid not 



changed ; on potato the growth is shining Avatery translucent, somewhat 



marked with more opaque white. Growth on agar white with a faint 



ocherous yellow tint. 

 Bemarks. I have seen no description of " Bacillus oxylacticus.^^ 



83. Bacillus epsiloii n sp. 



Occurrence. In the air of the college yard. 

 Morphuloi)//. Small rounded bacilli .5X- 7-1/', not motile. 

 Biohxjij. Gelatin rather (xuickly li(|uefied, nitrate not reduced, rosolic acid 

 not faded ; growth on agar translucent pink, shining. 



, 84. Bacillus zeta n sp. 



Occurrence. In the air of the college hallway. 



Morphology and biology. As in No. 83 but the growth is shining orange color. 



Growth is slow and liquefaction does not begin before ten days ; on the 



surface of milk a layer of red cream forms. 



*Ne\v York MedicalJourual, 1894, p. 265, 



