. 60 - 



groups. It indicates that the Heterokontae and the Bacillariophyceae 

 may belong to different classes. 



Pigments of the Bro\im Algae (Phaeophyta) 



T 16 



The pigments separated from additional species of brown algae ' 



are indicated by Figure III,7<» The species examined and their locations 

 are recorded in Appendix VII<, Pigmentvasej these organisms, with chloro- 

 phylls a and 0, fucoxanthin and its isomers, violaxanthin, and (3-carotene 

 plus or minus cA=carotene, are similar to the diatoms. 



With the algal extracts adsorbed in a coliomn of powdered sugar, the 

 violaxanthin was sorbed with and partially below the fucoxanthin. Re- 

 adsorption of the mixture of these two xanthophylls in columns of mag- 

 nesia yielded the violaxanthin zone far below the fucoxanthin zone ' ' * . 



Pigments of the Dinoflagellates (Pyrrophyta) 



The pigments of the dinoflagellates are illustrated by Figure 111,8, 

 Since these results were described in 19U3> no additional species have 



T 1 ^ 



become available * . The pigments include chlorophylls a and c, perid- 

 inin and its isomer, dinoxanthin and diadinoxanthin and their isomers, 

 and P-carotene, 



Pigments of Re d Algae (fihodophyta) 



The fat-soluble chloroplast pigments of the red algae and their 

 positions in the sugar columns are shown in Figure III,9o The varia- 

 tions of these pigments in many species are indicated in Appendix VIII, 

 The pigments include chlorophyll a plus or minus chlorophyll d^ lutein 

 and/or zeaxanthin, and (3-carotene plus or minus O^-carotene, 



In the species of most groups, P-carotene was the principal caro- 

 tene and lutein the principal xanthophyll. In a few species of two 



