102 ^'ol. XLITI., Art. l.-K. Yenclc : 



is a maturod form referrable to A. esculenta Grev. with utmost 

 certainty. Again, Lamiuaria Despreauxil Bory is represented in 

 the ■ Herbarium by a single specimen, very hkely one of the speci- 

 mens distributed by Deltse under the name. Tliis specimen is 

 kept in the Herbarium in the species cover of Â. PylalL Rup- 

 iiECHT^) has also remarked that Lamiuaria Desprcauxii Boey agrees 

 with Agariim PyJa'n Bory. Consulting the specimen in the Agardh* 

 ian Herbarium, the plant is undoubtedly a fully matured, first- 

 year form of A. Pylail Grev., with the sporophylls fully developed 

 and the greater part of the blade rubbed away (Plate HI). 



A. memhranacea J. Ag, mentioned in Gröiil. Lam. och Fuc, 

 p. 2G, should undoubtedly be amalgamated with the present 

 species, as has been already stated by Eosenvenge.^) The speci- 

 men from Greenland kept in the Agardhian Herbarium shows that 

 it is a young form with thin and membranaceous blade and a few 

 young and sterile sporophylls. On the other hand, however, some 

 of the specimens from Spitzbergen arc inseparable from A. grandi- 

 folia J. Ag., while some others are comparable with the Greenland 

 specimens. The former circumstance has already been noted by 

 Kjellman^) who states emphaticalty that the yoimg individuals of 

 A. grandifolia J. Ag. collected in Spitzbergen answer in all parti- 

 culars to A. memhranacea J. Ag. He goes as far as to say, " alia 

 de unga skulle tihhöra en art, men alla aid re utan undantag en 

 annan." He*) also admits that A. mmnhranaeca has a certain re- 

 semblance to A. Pylaii Grev. 



Laminar ia muscefolia De la Pyl is a species very hard to 

 understand. The description and figure given by the author are 



1) RuPKECHT : Tange des och. Meeres, p. 358. 



2) RosENVENGE ! Grönlands Hnvalgjr, p. 839. 



3) Kjellman : Spetzbergens Thallophyter, U, p. 12. 



4) I\jellman : Alg. Arct. Sea, p. 216. 



