Atkins — Oxydases and their Inhibitors in Plant Tissues. 201 



DincussioH of Tabulated Results. 

 Catalase is seen to be present in every specimen. But whereas in some 

 cases the evolution of gas was slow, in others, such as Polysiphonia and 

 Heterosiphonia, it was amazingly rapid. Tlie highly viscous nature of tlie 

 mashed-up algal tissue, in many instances, delays tlie movements of the 

 bubbles. 



1 Gives the direct guaiacum and benzidine reactions strongly, being the only alga that I have as 

 yet found to behave thus. The dried specimen gave a decided but less intense reaction ten days 

 later. In this, as in all other cases examined, no coloration of guaiacum was brought about by 

 boiled material. 



2 H 2 



