260 KJELLMAN, THE ALG OF THE ARCTIC SEA. 
conical, obtuse, issuing from a broad base, with free tips. They are usually simple, 
sometimes branched, downward composed of two or more rows of cells, upward of 
only one row. They form, together with the numerous paraphyses, an almost coherent 
layer, which is not however so dense as in Sc. lomentarius nor surrounded, as in that 
species, with a common tegument without distinct structure, a so called cuticula, which 
is dissolved in the formation of zoospores (gamets). The paraphyses are large cells, 
several times larger than the zoosporangia (gametangia), nearly obovate, sometimes 
almost club-shaped. They are always poor in endochrome, sometimes apparently alto- 
gether destitute of it. In arrangement and number they vary in the present species as 
in the preceding in different individuals and in different parts of the same individual, 
being sometimes very few, sometimes very numerous. The present species is essentially 
different from the preceding and easily distinguished from it by the shape of the frond 
and, above all, by the shape, size, and disposition of the zoosporangia (gametangia). 
In my account of the marine Flora of Spitzbergen I have determined this plant 
as Coilonena chordaria f. simpliciuscula. The specimens at my disposal were so badly 
preserved that I failed to get a clear view of the structure. Seen from the surface, 
the part provided with zoosporangia much resembles a Coilonema. The paraphyses appear 
as void zoosporangia and the extremities of the zoosporangia as rounded cortical cells. 
I interpreted my preparations in this manner. By a suitable treatment of some of the 
least injured specimens I have since found that this interpretation was wrong and that 
the present plant is plainly a Scytosiphon, though of another species than the common 
Se. lomentarius. 
Habitat. It grows on the upper part of the sublitoral zone, at a depth of 3—4 
fathoms, attached to other alge, both on exposed and sheltered coasts. Specimens 
taken in July on the east coast of Spitzbergen bear reproductive organs. 
Locality: The Greenland Sea: in Icefjord at Goose Isles and in Smeerenberg Bay. 
PUNCTARIACEZ (Tuur.) KsEtum. 
Pl. Scand. p. 9; Tour. in Le Jou. Liste Alg. Cherb. p. 14; lim. mut. 
Gen. Punctaria GREV. 
Alg. Brit. p. XLII. 
Punctaria plantaginea (Rota) Grev. 
l. c. p. 53. Ulva plantaginea Roru. Cat. Bot. 3, p. 243. 
f. typica. 
Descr. Punctaria plantaginea J. G. Ac. Spec. Alg. 1, p. 73. 
Fig. » » Harv. Phye. Brit. t. 128. 
Exsice. » » Arescu. Alg. Scand. exsicc. N:o 170. 
