290 KJELLMAN, THE ALG^ OF THE ARCTIC SEA. 



Syn. Enteromoi-pha intestinalis J. G. Ag. Spetsb. Alg. Progr. p. 2; Bidr. p. 11; Till. p. 28. 



» » f. compressa Kjellm. Spetsb. Thall. 2, p. 43; Algenv. Muim. Meer. p. 49. 



Scytosiphon compressus fi crispatus Lyngb. Hydr. Dan. p. 64. 

 Ulva compressa Gunn. F1. Norv. 2, p. 120 (?). 

 » » ScHKENK, Ural. Eeise, p. 547. 



» » SoMMEKF. Suppl. p. 186. 



» » Wg. F1. Lapp. p. 508; ex parte. 



» Enteromorpha Gobi, Algenfl. Weiss. Meer. p. 80; saltern ex parte. 



Habitat. This is one of the few species that are litoral in the whole Polar Sea. 

 It is attached to stones or algae and occurs both on exposed and sheltered coasts, 

 sometimes gregarious in considerable numbers. I have found it with reproductive or- 

 gans at Spitzbergen at the end of July, on the coast of Norway in August and September. 



Geogr. Distrib. The present species has been found circumpolar in some form or 

 other. The northernmost point where it is certainly known to occur is Fairhaven on 

 the north-west coast of Spitzbergen Lat. N. 79° 49'. 



Localities: The Xorwegian Polar Sea: Nordlanden, f. typica and f. capillacea, com- 

 mon and abundant; Tromso amt about the town of TromsS, f. typica and f. prolifera; 

 Finmarken at MaasO, Gjesvser, the southern coast of MagerS, Talvik, f. typica and f. 

 prolifera scarce, f. capillacea and f. racemosa rather abundant. 



The Greenland Sea: f. typica and a transition between it and f. racemosa, prett)- 

 common but not abundant on the north-west and north coasts af Spitzbergen. 



The Murman Sea: on the west coast of Novaya Zemlya rather local and scarce 

 in a form most nearly related to f. racemosa: Kolgujew Isle and the coast of Cisura- 

 lian Samoyede-land (?). 



The White Sea: at several places according to Gobi. 



The Siberian Sea: Actinia Bay, in a low, almost typical form. 



The American Arctic Sea: Port Kennedy, Beachey Island, Assistance Bay, Baring Bay. 



Baffin Bay: Cumberland Sound not rare; the west coast of Greenland at Fri- 

 deriksdal, Nanortalik, Lichtenau, Julianeshaab, Smallesund, Ameralik, Jakobshavn, Sakkak, 

 Rittenbenk, ff. capillacea, prolifera, and racemosa; Smith Sound between the 78:th and 

 82 :d latitude. 



Enteromorpha coraplanata KtJTZ. 

 Spec. Alg. p. 480; Cfr. Aiiln. Enterora. p. 25. 



f. prolifera nob. 



f. thalli axi priraario elongate, complanato, apicem versus dilatato, secundum totam longitndineni ramos 

 crebros, elongatos, axem primarium semulantes emittente. 



Description. A leading axis is plainly to be distinguished in the frond, attaining 

 a length of even 30 cm., downwards narrow, almost terete, upwards thickening and 

 flattened, about 1 cm. broad in its uppermost part. It bears along its whole length a 

 great number of simple branches of the same shape as the main axis. 



