517 



Order BOTRYDIACEAE. 

 CODIOLUM A. Braun. 



196. C. gregarium A. Braun. Alg. unicell. genera nova et minus 

 cognita, p. 20, pi. I. 



A great manv speeics of this genus have been described, and 

 I was at first rather doubtful lo whal species I should refer the 

 Færoese specimens, which I have shown in the accompanying 

 ligure (lig. 106). I hegan by re- 

 ferring them to C. longipes Foslie 

 as they appeared to nie to agree 

 closely with No. 458 in Nordst. & 

 Wittr., Exsicc. But on examining 

 a specimen of Codiohim gregarium 

 from Heligoland, determined by 

 A. Braun and dislrihuted 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 slem and the clavate 

 head insensibly merge into each 

 other, the specimens in the above- 

 mentioned Exsicc, at any rate the 

 fullv developed examples among 

 them, appeared on closer examina- 

 tion to have the stem and the head 

 separated by quite a distinctly 

 marked constriction, as is also 



shown in my figure; the stem also proved to be generally longer 

 Hum in Braun's figures. I therefore quite agree with the opinion 

 of Batters 1 (1. c), who rcgards (]. longipes as synonymous with 

 C. gregarium. FoslieV 2 ligures of Codiolum longipes do not, however, 

 show any decided limit between stem and head, a faet which 

 Kjell man points out in N. I., p. 389 (317), where he writes: — 

 The stipe does not always pass into the club-head so withoul a 

 a limit, as appears in the ligures of Foslie« and he continues: — 



1 Batters, E. A.L.: Marint' Algæ of Berwick-on-Tweed, p. 2(54. 



'-' Foslie, M.: Om nogle nye aretiske havalger (Christiania Vidensk.-Selsk. 



Forhandl. 1881). 



33* 



Fig. 106. Codiolum gregarium A. Braun. 40:1. 



