232 KJELLMAN, THE ALG^ OF THE ARCTIC SEA. 



tissima that Kleen has identified with L. Agardhii {L. caperata), and it is possibly the 

 same that Gunneeus has named Ulva maxima. 



Habitat. In the Polar Sea L. saccharina is sometimes litoral, sometimes sublitoral. 

 The f. linearis lives at low-water mark together with L. digitala. The f. oblonga occurs both 

 farther down and higher up than f. linearis. The two other forms I have met with 

 only in the lower part of the sublitoral zone, in 15 — 20 fathoms. The present species 

 prefers rocky bottom, but is found richly developed also on pebbl}' ground. It occurs 

 in the open sea and at exposed points of the coasts as well as in the interiör of deep 

 bays and in other sheltered localities. It is gregarious. On the coast of the Polar Sea 

 I have only had the opportunity of examining it during July and August, and at the 

 beginning of September. During this time f. linearis and f. oblonga were sterile, the 

 two other forms were furnished with zoosporangia. 



Geogr. Distrib. I have rayself found the present species in the Polar Sea only 

 on the coast of Norway, and on that account am of opinion that, with the exception 

 of the L. saccharina var. septemtrionalis reported by Rostafinski from the White Sea, 

 all the L. saccharina which has been stated to occur in the Arctie Sea is to be referred 

 to other species. It has its maximum of frequency on the north coast of Norway. 

 The northernmost point where it is certainly known to occur is Gjesva3r about Lat. 

 N. 71°. 



Localities: The Norwegian Polar Sea: Nordlanden common and abundant; Tromsö 

 amt at Tromsö, Renö, and Carlsö, common and abundant; Finmarken at Maasö, Gjesvajr, 

 Magerö Sound, Öxfjord, and Talvik. 



The White Sea: Cp. GoBi 1. c. 



Of the forras meiitioned f. oblonga appears to be commonest south of Tromsö; f. 

 linearis was plentiful at Gjesvter, f. grandifolia at Maasö and Gjesvticr; f. latissima was 

 abundant at Talvik in Altenfjord, more rare at Maasö and in tlie sound south of Magerö. 



Laminaria longicruris De la Pyl. 



Procl. Terre neiive p. 177. 

 Descr. Larniiiiiiiii longicruris J. G. Ag. Spec. Alg. 1, p. 135. 

 Fig. " » De la Pyl. 1. c. t. 9, lig. A et B. 



« » Harv. Phyc. Brit, t. 339. 



Exsicc. » » Parl. P]at. and Ands. Alg. Amer. N:o 117. 



/Syn. Laminaria longicruris .1. G. Ag. Grönl. Lam. och Fiic. p. 15; Grönl. Alg. p. 110. 

 » » AsuM. Alg. Hayes, p. 96. ■). 



» » Beown, Fl. Disc. p. 457. 



« » DiCKiE, Alg. Cnraberl. p. 237; Alg. Sutherl. 1, p. 141; Alg. Nares, p. 6. 



" saccharina Dickie, Alg. Walker, p. 86; Alg. Sutherl. 2, p. 191 (?). 



Remark on the species. I cannot at all share the opinion of Gobi that »die Art 

 Lam. lon<ricruris ffanz zu streichen ist und die unter diesem Namen verstandenen Formen 



^) That L. phylUtis which is stated by Ashmead to occur in Smith Sound, is probably young individuals of 

 this species. Cp. Ashm. Alg. Hayes, p. 96. 



