528 
with several of the blue-green algae which occur along the coasts 
of the Faeroes. 
It has been found in several places along the coasts of the Faeroes, 
and is probably common. 
RIVULARIA Roth. 
216. R. atra Roth 1 . Catalecta botanica III, p. 340. 
Found near high-water mark on exposed coast as well as in 
sheltered localities. It often grows at such a considerable height 
that it can only be wetted by the spray, and is, consequently, sub¬ 
ject to desiccation for a longer period at a time. 
Met with in July, October and November. 
Found hitherto only in the following localities: — Vid.: Ostvig and 
Vedvig (H. J.); Kuno (FI. J.); Ost. (H. J.); Str.: Thorshavn (!). 
1 Determ. Johs. Schmidt. 
ADDENDA ET CORRIGENDA. 
As that part of my paper in which the Fucus has been treated was 
already ready printed in the beginning of July I have not been able to 
refer to the description of Fucus spiralis L. given bj r Batters in his paper 
»A Catalogue of the British marine Alg3e« (Journal of Botany, Yol. XL, 
September 1902, Supplement, p. 50), in which he has expressed the same 
opinion of this species as I have in my present paper. 
To avoid confusion I may remark that when I write at pp. 465—6: 
»Fucus distichus L., Lyngb., Hydrophyt., p. 6 (partim, e specim.)« then it is 
to be understood that I fully agree with Lyngbye’s definition of this 
species, but his synonyms (with exception of Fucus distichus L.) should 
be excluded, as also his herbarium contains, besides typical specimens 
which correspond with his description, also one from the Faeroes, which 
is somewhat similar to f. linearis. 
At page 346 and throughout for fructifying read fruiting; pages 371, 
403, etc. for fructify read fruit. 
At page 383, Fig. 58, for Callithamnion granulation (Duel.) Ag. 
read C. corymbosum (Smith) Lyngb. 
At page 349, Lyngbye (Hydrophyt., p. 10) ... read p. 29. 
