The Botany of Iceland - 01.12.1928, Qupperneq 16

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JOHS. BOYE PETEBSEN
253. Loose soil in depression formed by a torrent west of Húsavík 26/t-
(Achnanthes coarctata, Hantzschia amphioxys v. xerophila, Navicula
contenta, N. mutica f. Cohnii, N. terrestris, Nitzschia debilis, Pinnularia
appendiculata v. irrorata, P. intermedia, P. parva v. minuta).
254. On ground beside a bridle path west of Húsavík 26/t.
(Achnanthes marginulata, Caloneis fasciata, Hantzschia amphioxys v.
xerophila, Navicula Atomus, N. brekkaensis, N. contenta, N. mutica f.
Cohnii, N. m. f. minima, Pinnularia appendiculata v. irrorala, P. inter-
media).
256. Ground sloping towards the road below a tún; Siglufjörður 29/t.
(Botrvdiopsis arhiza, Anomoeoneis brachysira, Diatomella Balfouriana,
Eunotia prærupta f. curta, E. p. v. bidens, E. robusta v. tetraodon, E. trio-
don, Fragilaria virescens, Gomphonema intricatum, Melosira crenulata,
Navicula Atomus, N. cocconeiformis, Pinnularia appendiculata v. budensis,
P. a. v. irrorata, P. subcapitata, Rhopalodia gibberula, Tetracyclus lacustris
v. emarginata.
North West lceland.
261. Beams in old breakwater, far above high water mark; Isa-
fjörður 31/t-
(Chlorella ellipsoidea, Desmococcus vulgaris, Pleurococcus vulgaris,
Prasiola crispa, Trochiscia hirta').
264. Soil from high road; Isafjörður 31/t.
(Vaucheria terrestris, Achnanthes marginulata, Navicula cincta v.
Heufleri, Nitzschia Ctausii, N. Palea v. perminuta).
268. On „heath” between Isafjörður and Flateyri; at height of
540 m. 31/7.
(Hormidium flaccidum, Prasiola crispa, Achnanthes pygmaea, Ca-
loneis fasciata, Navicula contenta, N. mutica f. Cohnii, N. nitrophila,
Pinnularia borealis, P. intermedia).
269. On road in Flateyri 31/t.
(Hormidium flaccidum, Hantzschia amphioxys v. genuina, Navicula
Atomus, N. cincta v. Heufteri, N. mutica f. Cohnii, Pinnularia appendiculata
v. irrorata, P. borealis, P. subcapitata).
South lceland.
270. On Stone near fish depot; Bráðræði near Reykjavík 2/s.
(Pleurococcus vulgaris).
275. On stone in fence; Reykjavík 2/s.
(Desmococcus vulgaris, Pleurococcus vulgaris, Prasiola crispa, Tro-
chiscia hirta).
276. Paling at Reykjavík 2/s.
(Apatococcus lobatus, Coccomyxa dispar, Desmococcus vulgaris).
280. Open space in grassland with plenty of moisture; near the
hot springs, Reykjavík 3/s.
(Phormidium autumnale v. uncinatum).