— 139 — 



forms common. I refer Strömfelt's f. hispida to Kjellmans f. robusta 

 according to Strömfelt's original specimens. 



The f. scapula is mentioned by Strömfeit as a distinct species, 

 H. scopula Strömf., but he shows that this species in the ramification 

 resembles the f. subsimplex of H. ramentaceum. I have seen three ori- 

 ginal specimens of H. scopula Strömf., two of which resemble well enough 

 Strömfelt's figure and description, but the third is a distinct f. subsimplex 

 of H. ramentaceum. The H. scopula is different from the other forms 

 of H. ramentaceum by the peculiar form of its ramification, but a similar 

 ramification occurs in the f. subsimplex, although not so fasciculate. I 

 have not met with specimens perfectly resembling the H. scopula, but 



a 



Fig. 3. Halosaccion ramentaceum. 



a, transverse section of part of the thallus showing the antlieridia (a) and 

 the elongated cells (ß) (384:1). — b, antlieridia viewed from above (384:1). 



sometimes I have found plants with a somewhat similar ramification, viz. 

 specimens of f. subsimplex with many subfasciculated, adventitious shoots, 

 which in most cases seems to have been caused by animals. 



It is a well known fact that nobody has, as yet, succeeded in dis- 

 covering the cystocarps of Halosaccion ramentaceum, and all that we 

 know, as yet, about the antheridia, is to be found in Paul Kuckuck: 

 Meeresalgen vom Sermitdlet und kleinen Karajakfjord ! ). The specimen, 



') Bibliotheca Botanica. Heft 42. 1897. 



