52 M. Foslie. 



his species as being identical with Harvey's Callithamnion 

 virgatulum Phyc. Brit. t. 313. K j e 1 1 m a n, however, records 

 it as a distinct form, f. Farlowii, and he says: «The two 

 figures (F a r 1 o w's and Harve y's) are very different from 

 each other, so as to make the impression that the two authors 

 by one and the same name have meant specifically distinct 

 algae*. 



Having seen a considerable number of this species at 

 East-Finmarken as well as at West-Finmarken I must agree 

 with F a r 1 o w considering his 1. virgatula to be so nearly 

 related to C. virgatulum H a r v. that, as far as I can judge, 

 it cannot even be maintained as a distinct form. The essen- 

 tial difference between the two figures is, according to my 

 apprehension, that Harvey's plant is wanting the rather 

 numerous and long hairs, but, on the contrary, bears nume- 

 rous short branches, consisting as it seems of a single cell. 

 These are, on the other hand, proportionally few on the spe- 

 cimen figured by Farlow, and still fewer on Kutzing's 

 figure. At Finmarken I have met with specimens bearing 

 numerous secondary branches consisting of 1 — 3 cells, though 

 not as numerous as on fig. 3 by Harvey. By other ones 

 these branches are almost wanting, the plant being sporife- 

 rous or not. And thus too with regard to the hairs. By 

 some specimens these appear rather abundant, by others 

 quite wanting, in which case the plant almost fully is cor- 

 responding with fig. 3 — 4 by Harvey. 1 The figures in 

 Phyc. Brit, are drawn from a richly sporiferous specimen, 

 and, therefore, I suppose it to be likely that some of the ap- 

 parently secondary branches on fig. 2 have been spores or 

 such organs in development. 



Harvey states that the species sometimes is difficult 

 to be distinguished from Ch. Baviesii. It is, in fact, rather 

 variable, but I never saw any transition between these two. 

 '. With reference to the division of the spores cp. Nag. Ceram. p. 170. 



