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. 



1 01. B. lucens, Van Tieghem (Bull Soc. Bot. 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. photometricum, Engelmann (Revue Internat. 



Sci., 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 /x, 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. chtlorinum, 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 



