88 Synopsis of the Bacteria and Yeast Fungi. 



then penetrate the cuticle of the hair, and finally ascend 

 within its substance, causing it soon to fall off. 



loi. B. lucens, Van Tieghem (Bull. Soc. Sot. France, 



1879, p. 141). 



Motionless, remarkable for its strong refringence and 

 brilliancy. Each cell forms a spherical spore. 



On the surface of water containing other organisms. 



102. B. plaotometricum, Engelmann {Revue Internat. 



Set., ix., 1882, p. 469). 

 Cells of a slightly reddish colour ; the author describes 

 neither their form nor size. The micro-spectroscope shows 

 a strong absorption of all the rays whose wave-length is 

 less than '62 fx,, especially of those between '62 and '59 

 (orange). It is sensitive in a high degree to the influence 

 of light (For details, see Jour. Roy. Micr. Soc, 1882, 

 p. 656, and 1883, p. 256.) 



103. B. chlorinum, Engelmann {I.e., p. 276). 



Cells 2-3 /A long, motile, of a greenish colour, paler 

 than that of a chlorophyll granule of the same size. It 

 presents in a high degree the tendency to accumulate in 

 the light, but only when oxygen is absent ; according to 

 the author, it disengages oxygen in the light, and is there- 

 fore not a Schizomycete at all. 



104. B, viride, Van Teighem {Bull Soc. Bot. France, 



1880, p. 174). 



Rods minute, of a pure green colour, constricted in the 

 middle, dividing frequently, and separating after each seg- 

 mentation, but otherwise immotile. In a large number of 



