MARY BELLE ALLEN 



481 



TABLE 1 

 Fluorescence of Ochromonas danica Cultures* 



'710 m/j, absorption peak clearly shown. 



- The position of the fluorescence maximum of chlorophyll in O. danica depends 

 on the proportion of the different in-vivo components of the chlorophyll a spec- 

 trum (1). 



^ Complex organic medium. 



* Synthetic medium. 



° Fluorescence measurements made in collaboration with Dr. C. S. French. 



than that of the wild type, as their only green pigment, and which 

 lack colored carotenoids. It is possible that the 710 rufx pigment is 

 more evident here because of the reduced quantity of the better- 

 known photosynthetic pigments. 



It is premature to hazard any guesses as to the nature of the 710 

 mfi pigment. It may be another in-vivo spectroscopic form of chloro- 

 phyll or another pigment of unknown nature. Work on its identifica- 



