417 
here I may remark that I have searched in vain for this alga on 
two original specimens gathered by Simmons near Kvalbo on 
which only Elachista scutulata occurred. 
95. E. Stilophorse Crouan, Florule du Finistere, Paris 1867. 
var. ccespitosa Rosenv., Gronl. Havalg., p.892. 1 
The description given by the brothers Crouan, 1. c., is very 
short, so that it is difficult to base a reliable determination on it, 
but as the Fseroese specimens gathered by me are undoubtedly 
identical with the plant figured by Rosen vinge (1. c. fig. 26, A), I 
Fig. 75. Ectocarpus Stilophorce Crouan. var. ccespitosa Rosenv. a part of a plant with pluri- 
locular sporangia; b part of a plant with unilocular sporangia; c the basal threads. 400: 1. 
report it here under this name. The plant, of which I have shown 
some fragments in fig. 75, was found growing in the sorus of a 
Laminaria; the plurilocular sporangia often occur several on each 
branch and attain to a thickness of about 5—6 p, and, as far as I 
could see, it bore also unilocular sporangia (see fig. 75, 5), the latter 
being cylindrical or somewhat swollen in the middle and attaining 
to a length of some 20—25 p and to a breadth of some 5 fi. The 
erect filaments occur abundantly in small patches, as pointed out 
by Rosenvinge. 
Specimens bearing both unilocular and plurilocular sporangia 
were met with in July. 
Found hitherto only on Str.: Thorshavn (!). 
1 Cfr. Svedelius, »Studier ofver Ostersjons Hafsalgflora«, Upsala 1901, p. 105. 
