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BROOKLYN BOTANIC GARDEN MEMOIRS 



has been made, the writer has been investigating some of the other 

 sections of Galaxaura as proposed or recognized by Kjellman in his 

 monograph of the genus and as accepted without question by writers 

 on the red algae during the past seventeen years, and grounds have 

 been found for beheving that a similar relation exists between several 

 other pairs of groups hitherto considered to be independent. The 



Fig. I. Cortex of a tetrasporic plant of Galaxaura marginata (Ell. & Soland.) 

 Lamour , in section, illustrating the cortex structure of the section " Brachycladia"; 

 enlarged about 210 diameters. (After Bprgesen.) 



Fig. 2. Cortex of antheridial plant of Gdlaxaura marginaia (Ell. & Soland.) 

 Lamour., in section, illustrating the cortex structure of Kjellman's section "Vepre- 

 culae," enlarged about 300 diameters. (After B0rgesen, under name Galaxauta 

 occidentalis B0rg.) 



Fig. 3. Figures showing the essentially free filaments, short and long (bases 

 only of the long), constituting the cortex of Galaxaura flagellifornns Kjellm., and 

 illustrating the cortex structure of Kjellman's section "Rhodura"; enlarged about 

 154 diameters. (After Kjellman.) 



Fig. 4. Cortex of Galaxaura squalida Kjellm., in section, illustrating the cortex 

 structure of the section "Microthoe"; enlarged 210 diameters. (After Bjzirgesen.) 



