The Botany of Iceland - 01.12.1916, Blaðsíða 9

MARINE DIATOMS FROM THE COASTS OF ICELAND
353
Diploneis? inæqvalis sp. nov. Tab. nost., fig. 4.
Long: 18 /i, lat: 7 /u.
Valva elliptica. Striis uno in latere valvæ 11 in 10 ,w, altero in
latere 14 in 10,«.
Dyrafjörður (N.W.), G. H. O.
It is with great hesitation that I refer this small species to Diplo-
neis. It seems closely allied to Navicula Reichardti Grun. var. Tschut-
chschorum Cl. Cl. Syn. II, 65; Cl. Vega, tab. XXXVII, flg. 48. Cleve places
Nav. Reich. among »Naviculae lyratae«.
In Diat. mar. p. 129 Peragallo places Nav. Reich. among Diploneis, but
remarks as follows: »Cette espéce n’est pas un vrai Diploneis, mais ce
n’est pas non plus une vraie lyrée car il n’y a pas de stries entre les
fourches ou aires centrales et le raphé.«
Naviculæ Fusiformes Cl. 1894. Cl. Syn., 1,105.
Navicula Acus Cl. Cl. Syn., 1,106; Per. D. mar., Tab. VIII, fig. 23.
Reykjavik (S.W.), C. H. O.
Area: Eur.
Navicula fusiformis Grun. var. ostrearia Gaillon. Cl. Syn., 1,106;
V. H. Trt., Tab. XXVII, fig. 769.
4 samples (S. 2, S.W. 2).
Area: Eur., Grl.
Navicula glabra sp. nov. Tab. nost., fig. 5.
Long: 41 /x, lat: 8 ,it.
Valva lanceolata. Raphe area augustissima cincta. Poris cen-
tralibus raphes distinctis. Structuram ullam valvæ perspicere non
potui.
Reykjavik (S.W.), H.Js.
This species somewhat resembles the unnamed Navicula (from Hvid-
ingso), delineated in A. S. N.S. D., tab. III, fig. 8, which in Cleve (Syn. I, 106)
is found under the name of Nav. Schmidti, but Cleve, as well as Peragallo
(Diat. mar. p. 67) give the number of striae as 17 in 10 /i, consequently
a distinct striation, while I have not been able to see any. By great en-
largement however the valves assume the peculiar misty appearance,
indicating a very flne structure.
Naviculæ Orthostichæ Cleve 1894. Cl. Syn., I, 107.
Navicula halophila Grun. Cl. Syn., I, 109: V. H. Trt., Tab. IV,
fig. 191. (N. cuspidata v. hal.).
Reykjavik (S.W.), C. H. O.
Area: Eur.