302 THE JOURNAL OF BOTANY 
In Burra Voe I found an almost identical Fucus-vegetation; here 
the shores were very flat, and the Fucus-vegetation, especially Asco- 
phyllum nodosum and Fucus serratus, occurred widely dispersed on 
the almost horizontal rocks; here, also, Halidrys siliquosa grew 
abundantly near low-water mark. 
On the more exposed Muckle Holm I found no Fucus; but on 
its almost vertical or sloping rocks I observed, from the summit 
downwards, Porphyra wnbilicalis, Urospora penicilliformis, and Bangia 
fuscopurpurea, Polysiphonia urceolata and Acrosiphonia, sp. ; further- 
more Gigartina mamillosa and Corailina officinalis intermixed with 
mentaria articulata. At about extreme low-water mark I found 
Laminaria digitata f. stenophylla and Alaria esculenta, and further 
own Laminaria hyperborea, the stems of which were covered with 
several epiphytes, especially a quantity of Ptilota plumosa. ‘ 
e only opportunity I had of dredging in deeper water was in 
Lerwick Fjord, a little to the south-east of the town. Here I found, 
in 8 to 10 fathoms of water, large societies of Laminaria hyper- 
borea, As usual, numerous epiphytes grew on the stipes of the 
latter, viz. Polysiphonia urceolata, Lomentaria clavellosa, Ptilota 
plumosa, Delesseria alata, D. sanguinea, D. sinuosa, Derbesia marina, 
Dermatolithon macrocarpum f. Laminaria, Nitophylium laceratum, 
Euthora cristata, &e. ; here large specimens of Laminaria saccharina 
find 
Iceland, and adjacent islands. 3 
_ [have put an (E.) after the names of the alge found by Edmond- 
ston, and have given the name used by him wherever this differs 
now in use. 
CyanopHycen. 
Dermocarpa prasina Born.—On Polysiphonia fastigiata. Burra 
Calothria confervicola Ag. (E.). 
Coro. 
___Prasiola crispa (Lightf.) Menegh. subspec. marina Borgesen in 
“Marine Alge of the Ferées,”’ p. 482 ( Botany of the Farées. Part IL.). 
