The Botany of Iceland - 01.12.1916, Blaðsíða 10

354
ERNST 0STRUP
Navicula Kryokonites Cl. var.? islandica v. nov. Tab. nost., fig. 6.
Long: 45 fx, lat: 8 fx.
Valva anguste-lanceolata. Striis subtilissimis et, qvoad perspi-
cere potui, subradiantibus, media in valva fasciam latam relin-
qventibus.
Brokey (S.W.), H. Js.
It is with some hesitation I refer this form to Nav. Krvokonites
Cl. It has no slight outward resemblance to Nav. Kryok. var. subprotracta
Cl. (Cl. Syn. I, 109; Cl. Vega Exp., tab. XXXVII, flg. 46) and has also, in
common with this, the fairly broad fascia; it differs partly by being
somewhat larger, but especially by the very fine striae, which, as far
as I could see, are slightly radiate. Nav. Kryok. subprotracta has 22 parallel
striae, at right-angles to the raphe, in 10 fi, and is found at Cape Ware-
karema and off East-Greenland.
Amphipleura Ktz. 1844. Cl. Syn., I, 125.
Amphipleura rutilans Trentepohl. Cl. Syn., I, 126; V. H. Trt., Tab. V,
fig. 255. (Berkeleya Dilhvynii An.).
6 samples (S.W. 2, N.W. 2, N. 2).
Area: Eur., Afr., As., Grl.
Naviculæ Mesolejæ Cleve 1894. Cl. Syn., I, 127.
Naviculæ mutica Ktz. forma Cohnii Hilse. Cl. Syn, 1,129; V. H.
Trt., Tab. IV, fig. 167. (Nav. mut.).
Vestmannaeyjar (S.), H. Js.
Area: Ubiquist, A. S.
Navicula (Dickeia) ulvacea Berk. Cl. Syn., I, 129; V. H. Trt., Tab.
XXVII, fig. 781.
Isafjörður (N.W.), H. Js.
Area: Eur.
Naviculæ Microstigmaticæ Cl. 1894. Cl. Syn., 1,141.
Naviculæ (Schizonema) Grevillei Ag. Cl. Syn., I, 152; V. H. Trt.,
Tab. V, fig. 243.
24 samples (S.W. 19, N. 4, E. 1).
Area: Eur., As., Am., Grl., A. S.
In conformity with Cleve 1. c. I include under Nav. Grevillei the
following:
Schizonema apiculatnm Ag. V. H. Syn., Tab. XVI, figs. 4—8.
Schizonema comoides Ag. V. H. Syn., 1. c. fig. 3.
Navicula Delognei H. V. H. V. H. Syn., Tab. XI, fig. 13.