KONGL. SV. VET. AKADEMIENS HAN])LINGAR. BAND. 20. N:0 5. 199 



f. turgida nob. 



f. vesiculifera; segmentis summis tantum alatis, linearibus angustis, vix ultra 5 mm. latis; systematibus 

 segmentorum fertilium quam steriles parura brevioribus; receptaculis globosis vel ellipsoideo-globosis, 1 cm. 

 crassitudine superantibus, valde turgidis. 



f. sphcerocarpa J. G. Ag. 



Gronl. Lam. och Fuc. p. 29. 

 Desor. Fucus vesiculosus f. sphaerocarpus Kleen, 1. c. 



Hybr. F. serratus + vesiculosus. 

 Descr. et Pig. Kleen, Nordl. Alg. p. 24; t. 9. 



Syn. Pucus vesiculosus J. G. Ag. Enum.; Gronl. Lam. och Puc. p. 30; Gronl. Alg. p. 110—111. 



» » Aresch. Puc. et Pycnoph. p. 102. 



» » AsHM. Alg. Hayes. (?) p. 96. 



» » Croall, pi. Disc. p. 457. 



» » Dickie, Alg. Sutherl. 1, p. 140; Alg. Curaherl. p. 236; ex parte (?). 



» » Gobi, Algenfl. Weiss. Meer. p. 53. 



» » GuNN. PI. Norv. 1, p. 48. 



» » Kleen, Nordl. Alg. p. 26. 



» » Lyngb. Hydr. Dan. p. 3; ex parte. 



» » Post, et Kupr. III. Alg. p. II; ex parte. 



» » Wg. pi. Lapp. p. 490; excl. var. 



Remark on the forms of this species. The first two of the forms quoted are well 

 known. I have preferred to call by the name of f. angustifrons Gobi that form common 

 in the southern part of the Polar Sea whose frond is narrow with ovate, oblong-lanceolate 

 receptacles and which Kleen has recorded as f. pseudoceranoides Aeescii. Kleen's description 

 of this form difFers considerably from Areschoug's description of subspec. pseudocera- 

 noides, and those specimens from Nordlanden which are to be found in Kleen's her- 

 barium with the name of f. 'pseudoceranoides do not resemble either the figure cited by 

 Areschoug for this subspecies or the form occurring in Bohuslan with which Areschoug's 

 description agrees. On this account I am of opinion that the forms to which the above- 

 mentioned name has been applied by Areschoug and Kleen are not identical. On the 

 other hand, Kleen's f. pseudoceranoides resembles that form which has been taken by Berg- 

 GEEN in northern Norway and distributed by J. G. Agardh under the name of F. vesi- 

 culosus. This is to be found also in the White Sea according to Gobi, who has pro 

 posed for it the name which I have employed above. The form I have called turgida 

 and of which I have given the diagnosis is nearly related to the preceding as well as 

 to f. sphcerocarpa. It differs, however, from both by its large, much swollen receptacles, 

 and seems to deserve attention, as on certain stretches of the coast of Norwegian Fin- 

 raarken it is an essential constituent of the vegetation of Fucaceoe. The very pretty 

 form from Greenland distributed by J. G. Agardh under the name of f. sphcerocarpa 

 has been found by Kleen at Nordlanden and by Gobi in collections brought home 

 from the western Murman Sea and the White Sea. On the coast of Finmarken at the 

 mouths of streamlets I have met with a form, the more robust specimens of which 



