A Monomgph of the Genus Alaria. JQl 



PI. 23, fig. 1 under A. elllptlca Kjellm. as a form of the present 

 species if the specimen liad not been growing with a matured form 

 of A. oblong a Kjellm. 



Most species of Alarla, as far as the observations of the 

 present writer extend, when grown in quiet water of less sahnity, 

 are more or less liable to have the stipe long, the blade thin, soft 

 and broad, the sporophylls thin, broad and few in number, in a 

 greater degree than the species typically ought to have ; in a 

 word, more or less approaching in the general aspect the present 

 species. Therefore, the collector should be warned when he has 

 found an Alaria resembling A. Pylaii Gkev. to pay special atten- 

 tion to the condition of the place where it was growing. 



Remarks on the synonyms. I have seen neither the original 

 specimen of Agarum Pylaii nor of Laminaria Pylaii De la Pyl. 

 J. Agaedh remarks in Spetzbergens Alger, Tillägg, p. 30, that he 

 thinks Agarum Pylaii Bory to be different from Laminaria Pylaii 

 De la Pyl. and compares the latter wâth Phasganon macropterum 

 RuPR. It is now almost impossible to decide the exact specific 

 limitations of the two. 



BÖKGESEN^) announces that A. Pylaii is founded by J. Agardh 

 from Bory's species. The priority of the specific name, as alluded 

 to above, must be given to Greville. The modern specific con- 

 ception comes down since J. Agardh has modelled from the Green- 

 land specimens. He has not based his opinion upon Bory's speci- 

 mens, as he says Bory's Agarum Pylaii is rather a doubtful species. 

 Cfr. Grönlands Lam. och Fucaceer, p. 24. One of the specimens kept 

 in the Agardhian Herbarium at Lund (No. 2004) bearing the name 

 " Laminaria Pylaii Bory " is a young and sterile form not positively 

 determinable as to species (Plate VHI). Another specimen (No. 209 1) 



1) BöEGESEX : iJar. Alg. of the Faeroes, p. 451. 



