517 
Order BOTRYDIACEAE. 
CODIOLUM A. Braun. 
196. C. gregarium A. Braun. Alg. unicell, genera nova et minus 
cognita, p. 20, pi. I. 
A great many species of this genus have been described, and 
I was at first rather doubtful to what species I should refer the 
Fseroese specimens, which I have shown in the accompanying 
figure (fig. 106). I began by re¬ 
ferring them to C. longipes Foslie 
as they appeared to me to agree 
closely with No. 458 in Nordst. & 
Wittr., Exsicc. But on examining 
a specimen of Codiolum gregarium 
from Heligoland, determined by 
A. Braun and distributed in Ra- 
benhorst, Algen Europa’s, No. 1841 
I found that my specimens corres¬ 
ponded closely with this spe¬ 
cies also. While in Alexander 
Braun’s figure of C. gregarium 
(1. c.), the stem and the clavate 
head insensibly merge into each 
other, the specimens in the above- 
mentioned Exsicc., at any rate the 
fully developed examples among 
them, appeared on closer examina¬ 
tion to have the stem and the head 
Separated by (juite a distinctly Fig. 106. Codiolum gregarium A. Braun. 40:1. 
marked constriction, as is also 
shown in my figure; the stem also proved to be generally longer 
than in Braun’s figures. I therefore quite agree with the opinion 
of Batters 1 (1. c.), who regards C. longipes as synonymous with 
C. gregarium. Foslie’s 2 figures of Codiolum longipes do not, however, 
show any decided limit between stem and head, a fact which 
Kjellman points out in N. I., p. 389 (317), where he writes: — 
»The stipe does not always pass into the club-head so without a 
a limit, as appears in the figures of Foslie« and he continues: — 
1 Batters, E. A.L.: Marine Algae of Berwick-on-Tweed, p.264. 
2 Foslie, M.: Om nogle nye arctiske havalger (Christiania Vidensk.-Selsk. 
Forhandl. 1881). 
33 * 
