NOTE ON A PINK TORULA. 271 



new increment of the mass at the bottom of the now solid 

 nourishing material is not pink, but colourless. 



Schroter (Cohn's ' Beitrage zur Biologic d. Pflanzen/ ii 

 Heft. p. 112) mentions in a footnote that he observed occasion- 

 ally on discs cut from a potato, mucous droplets of a pinkish 

 colour, which, when examined under the microscope, were seen 

 to consist entirely of torula cerevisise. The cells were not 

 coloured. 



My friend Professor Lankester informs me, that when carrying 

 on his researches on Bacterium rubescens (see this Journal, 

 New Series, vol. xiii) in the laboratory of the Botanic Garden, 

 Oxford, he observed a pink torula which spontaneously made 

 its appearance in a test-tube containing Pasteur's solution. 



