The Botany of Iceland - 01.12.1928, Qupperneq 13

THE AERIAL ALGÆ OF ICELAND
337
140. A layer of algae in an almost dry spot in a ditch by tlie
roadside south of Akureyri 10/l
(Desmidiaceae, Zygnema sp., Achnanthes linearis, Caloneis fasciata,
C. Silicula, Cymbella æqualis, C. ventricosa, Diploneis ovalis v. oblongella,
Eunotia paludosa, E. pectinalis, Gomphonema parvulum, Navicula cincta
v. Heufleri, N. mutica f. Cohnii, Nitzschia amphibia, Pinnularia borealis,
P. gracillima, P. stauroptera v. interrupta, P. viridis, Rhopalodia ventricosa,
Stauroneis anceps).
153. On rocks splashed with water from a cataract north of
Akureyri 12/i.
(Nostoc commune).
155. Shedding epidcrmis of Betula odorata in the wood at Háls 14/7.
(No algæ).
156. Shedding bark of Betula in the wood af Háls u/t.
(Young thalli of a lichen).
157. On the lower portion of the stem of a Betula; Háls u/t.
(No algæ).
158. From the stem of a large Betula in tlie wood at Háls; abt.
1 m. above the ground uh.
(No algæ).
159. On the stem of the same tree quite near the ground u/t.
(Some indeterminable round cells of a Chlorophycea).
160. Almost naked earth from the wood at Háls 14/7.
(Achnanthes marginulata, Eunotia prærupta f. curta, Hantzschia
amphioxys, Navicula contenta, N. mutica f. Cohnii, P. borealis, P. inter-
media, P. subcapitata v. sublanceolata).
161. Háls parsonage; »hlað« uh.
(Fragilaria mutabilis, Meridion circulare, Navicula nitrophila, Pinnu-
laria borealis).
162. Háls parsonage; on turf near the stonc fence in front of the
house 15/7.
(Prasiola crispa, Achnanthes lanceolata, Dialomella Balfouriana,
Epithemia Zebra, Gomphonema angustatum, Hantzschia amphioxys, Navi-
cula Atomus, N. contenta, N. mutica f. Cohnii, N. nitrophila, Nitzschia
amphihia v. aculiuscula, Pinnularia borealis, P. intermedia).
169. Damp ground on the bank of a pond near Ljósavatn 1&/i.
(Achnanthes marginulata, Caloneis fasciata, C. Silicula v. minuta,
Cocconeis Placentula, Cytubella ventricosa, Diatomella Balfouriana, Diplo-
neis ovalis v. oblongella, Epithemia Zebra, Fragilaria construens, F. vi-
rescens, Gomphonema acuminatum f. coronata, Melosira crenulata, Navicula
anglica, N. brekkaensis, N. contenta, N. cryptocephala v. angusta, N. c. v.
exilis, N. mutica f. Cohnii, N. radiosa, Nitzschia Palea v. perminuta, Pinnu-
laria appendiculata v. irrorata, P. borealis, P. gracillima, P. subcapitata,
P. viridis v. commutata, Rhopalodia gibba).