CROALL, MARINE ALQ^ OF GREENLAND. 277 



5. Laminaria saccharina, Lam. 



Everywhere in the Laminarian zone ; called kak-wok by the 

 natives. 



6. Chorda Jllum, Ag. 



Rockpools, and similar to such on our own shores, also in 2 

 fathoms ; abundantly. Sakkak, Waigatz Strait. August. 



7. Agarum Turneri, P. & R. 



Very abundant in Egedesminde harbour, in from 5 to 6 fathoms ; 

 substance of frond very brittle when fresh. 



[In both 1861 and 1867 I identified as common along the Arctic 

 shores, Laminaria longicruris, De la Pyl., and L. fascia, Ag. 

 Among a small collection made at Godhavn by Frue Smith, 

 wife of the Royal Inspector of North Greenland, I detected L, 

 digitata^ L., in addition. — R. B.] 



DlCTYOTACEuE. 



8. Dictyosiphon foiniculaceus, Grev. 



The specimens exhibits both the solid and fistulose state of the 

 plant, but no spores were observed. Most of the specimens had 

 been found floating. Jakobshavn, 3 fathoms, July 5, with many 

 Diatomaceae ; Egedesminde, June 10th, highwater-mark ; pools 

 on shore, with Schiezonema obtusum ; Claushavn, 30th June, 

 floating near shore ; Disco Bay generally ; Ritenbenk, on shore, 

 August ; Sakkak, in 2 fathoms, August ; everywhere common. 



Chordariace^. 



9. Chordaria fiagelliformis. Lam. 



Parasitic on L, longicruris, floating in Davis's Strait, May 29th ; 

 rock-pools at highwater-mark, Egedesminde, 10th June. 



10. Elachista fucicoli, Fries. 



Parasitic on Fucus vesiculosus, in company with E. crinitus ; in 

 rock-pools within highwater-mark, where streams of fresh water 

 flow over it during a portion of the day. Jakobshavn. June. 



ECTOCARPACEiE. 



1 1. Sphacellaria plumosa, Ag. 



12. S. cirrhata, Ag. 



The first species appears to be the most common, as small frag- 

 ments of it were continually occurring entangled with almost 

 every specimen .... No separate specimens were observed ; 

 but very satisfactory fragments were found among a mass of 

 rubbish washed up at highwater-mark, at Godhavn harbour, with 

 other Algse and freshwater plants. 



13. Ectocarpus siliculosus, Lyngb. 



Very dwarfish, scarcely an inch in height, and barren ; floating 

 in the sea off" Holsteensborg, &c. May, 



