Contribution. I. 153 



and coarser plant than that one. I am, therefore, obliged 

 provisionally to regard it a distinct species. 



The present plant grows on wood-work in the upper 

 part of the litoral zone together with Urospora penicillifor- 

 mis. Specimens collected in the beginning of August were 

 sparingly zoosporiferous. 



Distribution: Found at Vardo, pretty plentiful but lo- 

 cal. 



Codiolum intermedium Fosl. 



in Troniso Mus. Aarsh. X, p. 193. 

 Descr. Codiolum intermedium Fosl. 1. c." 

 Fig. „ „ „ t. 2, fig. 1-12. 



Exsice. „ „ Wittr. et Nordst. Alg. exsicc. Nr. 954. 



This species is more variable than any other of the ge- 

 nus. However it appears to be pretty well differentiated. 

 The club is elongated-obovate, obovate or roundish, and the 

 stipe often is rather sharply defined from the clava. 



The plant grows on rocks and woodwork in the upper 

 part of the litoral zone, together with other smaller algse, 

 as Urospora, Calothrix and Gloeocapsa. Specimens with zoo- 

 spores have been taken in the earlier half of August. 



Distribution: Found at Vardo, local and rather scarce, 

 and at Kjelmo, scarce. 



On the following page I give a comparative table of 

 the species af Codiolum hitherto known. 



