234 KJELLMAN, THE ALG^ OF THE ARCTIC SEA. 



Laminaria Agardhi4 Kjellm. 



Spetsb. Thall. 2, p. 18. 



Descr. Laminaria caperata J. G. Ag. Lam. p. 13. 



» Agardhii Kjellm. 1. c. 



Pig. » B » » t. 1, fig. 2 — 3. 



Syn. Pucus saccharinus Pall. Eeise, 3, p. 34. 



» » ScoKESBY, Account 1, p. 132. 



Laminaria Agardhii Kjellm. Spetsb. Thall. 2, p. 18; Algenv. Murm. Meer. p. 37; Kariska hafvets 

 algv. p. 24. 

 B caperata J. G. Ag. Spetsb. Alg. Bidr. p. 5 et 11; Till. p. 28. 



i> B Gobi, Algenfi. Weiss. Meer. p. 76. 



B » Kjellm. Vinteralgv. p. 64. 



B longicruris J. G. Ag. Spetsb. Alg. Progr. p. 2; Bidr. p. 11. 



» ophiura Lindbl. Bot. Not. p. 157. 



» phyllitis Nyl. et Ssel. Herb. Fenn. p. 73 (?). 



» » Post, et Eupb. 111. Alg. p. II (?). 



B B Zelleb, Zweite d. Polarf. p. 84 (?). 



B saccharina (?) J. G. Ag. Spetsb. Alg. Progr. p. 2; Bidr. p. 11. 



B » Eaton, List. p. 44. 



» » Post, et Edpr. 111. Alg. p. II (?). 



» » ScHBENK, Ural Eeise, p. 546. 



» » WiTTR. in Heugl. Eeise, p. 284. 



Ulva latissima Martin, Met. Obaerv. p. 313. ^) 



Remark on the species. It should be added here to the description of this species 

 given by J. G. Agardh and by myself, that it differs in the structure of the lamina 

 from L. saccharina, from which certain forms of it are only with great difficulty to be 

 distinguished by outward marks. I have examined a great many specimens from diffe- 

 rent localities, at different seasons, and in different stages of development, but I have 

 never been able to detect any muciferous canals in the lamina. Thus I believe I may 

 gay that in the alga called by J. G. Agardh L. caperata, which name I have thought 

 fit for reasons already stated to replace by L. Agardhii, muciferous canals either are 

 wanting in the lamina, or, if they really exist there, are very difficult to detect, and at 

 least different in position, shape and size from the same organs in Scandinavian L. 

 saccharina. I ought to point out however that it has been stated by Le Jolis who 

 has made the structure of the Laminariacece the subject of accurate investigations, that 

 the lacunae muciferse (»canales muciferi») in the lamina of L. saccharina are very small 

 — »tres petits» — and that wleur extreme petitesse par rapport aux enormes cellules 

 irregulieres, qui constituent le tissu de la fronde, les rend tres difficiles a apercevoir*. 

 (Le Jol. Exam. p. 548), which observations do not at all accord with the results of 

 my own researches on Scandinavian L. saccharina. In all the L. saccharina from our 

 coasts that I have examined, I have found these cavities large, very distinct, and often 

 confined in a greater or less part of their circumference by cells differing in shape and 



-J The species is also recorded at Spitzbergen by Martens, by whom it is described and figured. See Mae- 

 tens, Voyage Spitzb. p. 79, tab. J, fig. C. 



