149 



Trondhjem Fjord I occasionally met with specimens of a rather 

 dark brownish pink colour. 



Remark on the synonomy. The plant that Far low records 

 1. c. by the name of Melobesia Lenormandi most probably at 

 least in part includes the present species. „The tetrasporic con- 

 ceptacles are large but very much flattened" and the crust „rose- 

 colored", which does not correspond with L. Lenormandi (Aresch.), 

 but on the contrary appears to accord well with the present species. 



Of L. Lenormandi Gobi 1. c. I have seen three authentic 

 specimens from the White Sea. Two of these, which are fertile, 

 agree fully with the present species, the one growing together with 

 a young individual of another species, probably Li. colliculosum. 

 The third specimen on the other hand is quite likely a form of 

 L. flavescens, but the conceptacles of sporangia are a little smaller 

 than in the latter, and I have not examined the sporangia, nor 

 the structure. 



Relation to other species. As remarked, it is closely allied 

 ■with L. Lenormandi, but distinguishes itself partly in colour partly 

 and especially with reference to the reproductive organs, and in 

 typically developed specimens also by its smoother surface. The 

 cystocarpic conceptacles are different both in shape and size, and 

 those of sporangia are frequently much larger, more flattened, never 

 so densely crowded as common in L. Lenormandi, and the mu- 

 ciferous canals are more numerous. With regard to the difference 

 in structure cp. Rosenvinge 1. c. 



The species seems in some respects also to show greater 

 affinity to L. tenue (Kjellm.) 1 ). 



It is on the other side now and then difficult to separate it 

 from certain forms of L. flavescens, and even sporangia-bearing 

 specimens, without closer examination, can be confounded with 

 such of the latter, in which the conceptacles have not yet grown 

 down into the frond, although the superficial ones are more pro- 

 minent in the named species. 



Besides, younger individuals are easily confounded with young 

 ones of other species. 



a ) Beringh. Algfl. p. 22. 



