443 



that they were destroyed by llie rough handling. I think I found 

 hoth plurilocular and unilocular sporangia. The former (fig. 83, e, 

 f, g) strikinglv resemble those described by Kuckuck and occur 

 in the same small, almost tuber-like protuberances which are un- 

 doubtedly always formed by the apical cells of the filaments; the 

 plurilocular sporangia appear to be able to attain to a larger size 

 Ihan stated by Kuckuck, viz. a breadlh of 20— 30— 70>. Willi 

 regard to the unilocular sporangia, I am not quite sure that they 

 really are such, the cell-contents having been destroyed. What I 

 have referred to them are some large cells, of which several fre- 

 quently occurred close together on a few branches. I have shown 

 them in lig. 83, h and i, and I think they agree fairly well with 

 Kuckuck's figure, and also correspond well with regard to size, 

 being about 30 — 40 fi broad. The free filaments are about 16 — 18 a 

 broad. As I said before, I can state nothing for certain as to cell- 

 contents, chromatophores, etc. (but I may point out that in some 

 of the cells the chromatophores appeared to be ribbon -shaped or 

 reticular, a character which distinguishes this species from the other 

 hitherto-known Plucostroma-species), nor do I know anything about 

 the development of the plant, nor how it penetrates into the La- 

 minar ia 1 . 



This plant has been found on Laminaria færoensis which grew 

 in shallow water. 



It bore both plurilocular and unilocular sporangia (?) in July. 



Found hitherto only on Str.: Sundene between Thorsvig and Kvalvig (!). 



Order DICTYOSIPHONACEAE. 



IHCTYOSIPHON Grev. 



133. D. foeniculaceus (Huds.) Grev. Kjellm., N. I., p. 333 (269); 

 Scytosiphon foeniculaceus Lyngb., Hydrophyt., p. 63. 



Grows in shallow water especially in sheltered localities; occurs 

 commonly as an epiphyte on Chordaria flagelliformis. 



Sporangia-bearing specimens were found in summer. 



This species for the exanii nation of which I have not had much 

 material is undoubtedly rather conimon along the Færoese coasts as 

 reportcd by Lyngb ve, who writes: — »Ad insulas Færoenses copiose«. 



1 Ph. pustiilosum w;is found endophytic by Rosenvinge (Deux. Mém., p. 68) 



in Dehtmcirea alteniiata. 



