174 



Syn. Lithophyllum læve Stromf. Algveg. Isl. p. 21. 

 „ „ Fosl. 1, c. p. 10. 



„ Lenormandi f. læve Fosl. Contrib. II, p. 10. 



Remark on the spedes and description of the form. Through 

 the kindness of Kolderup Rosenvinge I have had the opportu- 

 nity to examine some specimens of his Lithothamnion tenue. This 

 species includes the plant that I have referred to Lithophyllum 

 læve Stromf. and in Contrib. 1. c. subsumed as a form of L. 

 Lenormandi (Ares ch.). Besides, it includes another, coarser form 

 which I also met with along the northern part of the coast. How- 

 ever, being uncertain where this form really ought to be placed 

 I then left it unrecorded, though some specimens were with doubt 

 referred to the named f. læve. 



. St ro rn fe It 1. c. quotes his L. læve to be closely related to 

 L. Lenormandi. Judging from his description and supposing the 

 sporangia not to have been fully developed in the specimens exa- 

 mined by him, but mature ones being tetrasporic as in my speci- 

 mens, I considered them identic. 1 ) Although I am still of opinion, 

 that the present species is identic with or includes i. læve Stromf., 

 there is, however, nothing to prove, that this in fact is the case. 

 No specimen of the plant is to be found in Stromfelt's collection 

 in the Riksmuseum at Stockholm, and, perhaps, it may have been 

 another but nearly allied species. I, therefore, here do not adopt. 

 this name. 



On the other hand, the name tenue has already been applied. 

 to a species of the subgenus Lithophyllum, viz. L. tenue (Kjellm.) 3 ). 

 I, therefore propose the species in question to be named after the 

 late H. F. G. Stromfelt. 



*) Rosenvinge mentions bisporic sporangia occasionally found by him, and. 

 I have also seen such ones, but they have probably not been fully deve- 

 loped. The measures given by Stromfelt apparently show narrow spo- 

 rangia. These organs are in fact much varying, and small sporangia may, 

 not seldom, be found together with very large ones in one and the same- 

 conceptacle. I want, however, to remark, that the sporangia being bent. 

 somewhat inwards and thereby often lying more or less on the side when. 

 removed from the conceptacle look narrower than they really are. 



2 ) Be:ingh. Algfi. p. 22. 



