The Botany of Iceland - 01.12.1916, Side 26

370
ERNST 0STRUP
Synedra affínis var. rnpicola Grun. V. H. Syn., 1. c., fig. 27.
Area: Eur., Grl.
Synedra affinis var. tabulata Ktz. V. H. Syn., 1. c., flg. 9 A.
Area: Eur., Aust., Grl.
Synedra affinis var. typica Ktz. A. S. Atl., Tab. CCCV, figs. 6—12.
Area : Ubiquist, Grl., A. S.
Amongst these, the most frequently occurring species are:
typica: 106 samples (S. 17, S.W. 48, N.W. 20, N. 11, E. 10).
tabutata: 44 samples (S. 4, S.W. 20, N.W. 6, N. 13, E. 1).
gracilis: 41 samples (S. 2, S.W. 12, N.W. 7, N. 17, E. 3).
parva: 14 samples (S. 2, S.W. 5, N.W. 3, N. 2, E. 2).
Synedra crystallina (Lyngb.) Ktz. V. H. Trt., 315, Tab. X, fig. 435.
Vestmannaeyjar (S.), H. Js.
Area: Eur., Afr.. As., A. S.
Synedra curvata sp. nov. Tab. nost., fig. 14.
Long.: 104—178lat.: media in valva, 3,6—5p, str. 19—20
in 10 f i.
Valva lineari, apices versus leniter attenuata, curvata. Striis
marginalibus.
Isafjörður (N.W.), C. H. O.
Owing to its marginally situated striae, this species is probably most
closely allied to the form-series of Synedra afíinis. It has no connection
with Sjm. curvula Ktz. Bacil., 65, tab. XV, fig. II (a fresh-water species
from Nordhausen in Saxony).
Synedra Gailloni Ehr. V. H. Trt., 312, Tab. X, fig. 424.
16 samples (S. 1, S.W. 15).
Area. Eur., Afr., As., Am.
In a sample from Melvik, near Reykjanes (S. W.), C. H. O., I have
found a Synedra, which corresponds well with Syn. capensis Grun. V. H.
Syn., tab. XLII, fig. I, a form closely allied to Syn. Gail.
Synedra Hennedyana Greg. V. H. Trt., 317, Tab. X, fig. 438.
Vattarnes (E.), H. Js.
Area: Eur.
Synedra investiens W. Sm. V. H. Trt., 313, Tab. X, fig. 425.
62 samples (S. 17, S.W. 25. N.W. 5, N. 8, E. 7).
Area: Eur., Grl.
Synedra kamtschatica Grun. Cl. & Gr. A. D., 106; 0st. 0stg. mar.,
Tab. VII, fig. 85.
8 samples (S. W. 1, N.W. 1, N. 4, E. 2).
Area: Grl., A. S.