194 BROOKLYN BOTANIC GARDEN MEMOIRS 
ture and tetrasporic, 7 were of the ‘‘ Vepreculae”’ structure and cysto- 
carpic, 5 were of the ‘‘Vepreculae’”’ structure and antheridial, and 1 
was of the ‘‘ Vepreculae”’ structure and apparently sterile. Of 9 plants 
(no. 6966) found growing together at the mouth of Guanica Harbor, 
Porto Rico, 6 were of the ‘‘Vepreculae” structure, 2 of them being 
obviously antheridial, and_3 were of the ‘‘Brachycladia’’ structure, 
2 of them obviously tetrasporic. Of 5 specimens (no. 7468) found 
near low-water mark on Muertos Island, Porto Rico, 2 were of the 
‘“Brachycladia’’ structure and tetrasporic, and 3 were of the ‘*Vepre- 
culae”’ structure, I being cystocarpic, 1 antheridial, and 1 apparently 
sterile. In some cases, a considerable series of specimens, all of one 
group, has been collected, but in collecting the red algae it often 
happens, as is well known, that the plants found at one time and place 
may be either all tetrasporic or all sexual. Without waiting for the 
results of cultural experiments which might furnish absolutely complete 
proofs of the suggested genetic continuity, it seems to the writer that 
the evidence is overwhelming that the so-called species of the Kjell- 
man’s “‘Vepreculae”’ section are simply the sexual phases of the species 
of the ‘‘Brachycladia”’ section. It is of interest to note that Bgrgesen, 
in a recent instalment of his admirable series of papers on ‘‘ The Marine 
Algae of the West Indies,”* relying upon the sectional distinctions 
proposed by Kjellman, appears to have described and figured the 
antheridial plant (sect. ‘‘Vepreculae’’) of Galaxaura marginata (Ell. 
& Sol.) Lamour. as a new species under the name Galaxaura occt- 
dentalis Bérg., taking the tetrasporic plant (sect. ‘‘Brachycladia”’) 
to be the true G. marginata. 
When we come to examine the alleged species of some of the 
other sections of the genus Galaxaura, as monographed by Kjell- 
man, we find strong evidences of other correlations similar to those 
already described for the Cameratae-Spissae and Brachycladia-Vepre- 
culae groups. In Kjellman’s section ‘‘Rhodura,’’ the peripheral 
elements of the thallus are so manifestly and predominantly fila- 
mentous (TEXT-FIGURE 3) that there is little ground for using the term 
cortex” in connection with these plants, yet there is commonly a 
*2: 109-113. f. 118-123. 1916. 
‘ The original of the Corallina marginata of Ellis and Solander (Nat. Hist. Zooph.. 
115. pl. 22. f. 6. 1786) was from the Bahama Islands, and, like most of the Ellis 
and Solander types, it is not certainly known to be now in existence. However, 
there is, in the herbarium of the Royal Botanic Gardens at Kew, an old fragment, 
inscribed in the hand of Lamouroux: 
Galaxaura marginata 
COPaitink <5 oy. Go; Sol. et Ell. 
. Bahame . 
which may or may not represent an authentic bit from the Ellis collection. This is 
antheridial and has the ‘‘ Vepreculae”’ structure. 
