KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 20. N:0 5. 287 



Fam. ULVACE^ (Ag.) Wittr. 



PI. Scand. p. 17; Ag. Syst. Alg. p. XXX; lim. mut. 



Gen. Enteromorpha (Link) Harv. 



Man. p. 173; Link. Epist. p. 5; ex parte. 



Enteromorpha clathrata (Roth) Grev. 

 Alg. Brit. p. 181. Conferva clathrata Roth, Cat. Bot. 3, p. 175. 

 Descr. Enteromorpha clathrata Ahln. Enterom. p. 43. 



f. Agardhiana Le Jol. 

 Lista Alg. Cherb. p. 49. 

 Descr. Ulva clathrata a Agardhiana Le Jol. 1. c. 



Syn. Enteromorpha clathrata DiCKlE, Alg. Curaberl. p. 239 (?); Alg. Nares p. (7). 

 >i I) Kleen, Nordl. Alg. p. 40. 



Habitat. It is iisually litoral, sometimes sublitoral according to Kleen, attached 

 to stones. In general it is gregarious, but does not occur in any greater numbers 

 together. I have found it only on sheltered coasts. It would seem however from the 

 account of Kleen as if it should live at Nordlanden even in exposed localities. Only 

 sterile speciinens are known from the Polar Sea. 



Geogr. Distrib. This species is known to occur in the Norwegian Polar Sea and 

 reported froin Baffin Bay. In other parts of the Arctic waters it has not been met 

 with. It seerns to me probable that Dickie's statement of its occurrence in Baffin Bay 

 in the high North depends on fine, richly branching forras of E. compressa having been 

 somehow confounded with E. clathrata. However, not having myself seen the speciraens 

 determined by Dickie, I cannot decidedly dispute the correctness of his statement. The 

 present species is rather abundant, but not cominon, in the Norwegian Polar Sea. Its 

 northernmost point would be Port Sheridan in Smith Sound Lat. N. 82° 27'. 



Localities: The Norwegian Polar Sea: Nordlanden common and abundant; Fin- 

 marken pretty plentiful at Öxfjord and Talvik. I have not observed it elsewhere. 



Baffin Bay: Cumberland Sound, Hayes Sound, Buchenau Strait, and Port She- 

 ridan according to Dickie. 



Enteromorpha intestinalis (L.) Link. 



Epist. p. 5. Ulva intestinalis L. Spec. Pl. p. 11G3. 



f. genuina Ahln. 

 Enterom. p. 18. 



Descr. Enteromorpha intestinalis a genuina Ahln. 1. c. 



Fig. „ •> KiiTZ. Tab. Phyc. G, t. 31. 



Exsicc. n » Aresch. Alg. Scand. exsicc. N:o 122. 



