192 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 believing that a similar relation exists between several 
other pairs of groups hitherto considered to be independent. The 
Fic. 1. 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 Borgesen.) 
Fic. 2. Cortex of antheridial plant of Galaxaura marginata’ (Ell. & Soland.) 
Lamour., in section, illustrating the cortex structure of Kjellman’s section “ Vepre- 
culae,”’ enlarged about 300 diameters. (After Bérgesen, under name Galaxaura 
occidentalis Bérg.) 
Fic. 3. Figures showing the essentially free filaments, short and long (bases 
only of the long), constituting the cortex of Galaxaura flagelliformis Kjellm., and 
illustrating the cortex structure of Kjellman’s section ‘“‘Rhodura’’; enlarged about 
154 diameters. (After Kjellman.) 
Fic. 4. Cortex of Galaxaura squalida Kjellm., in section, illustrating the cortex 
structure of the section ‘‘Microthoé"’; enlarged 210 diameters. (After Bérgesen.) 
