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l925 l Setch&ll-Gardn&r: Mekmophyceae
doliiform, 2-3 times as long as the diameter at the base, 0.3-0.8 times
as long- a short distance above the base. 1-1.5 times as long in 1 1n-
widest part, up to 6 times as long at the apex ; chromatophore a fine
nodular network in the young cells, separating more or less into
spheroidal masses in the older cells; zoosporangia subovate to broadly
clavate. 75-100/* (up to 135/*) long, 30-40/* broad at the outer end;
gametangia unknown; paraphyses clavate, about 225/* long, slightly
curved at times but not sensibly constricted at the dissepiments.
Growing on other species of algae, especially those of Rfvodymenia.
From Prince William Sound to Wrangell, Alaska.
Ruprecht, Tange Ochots. Meer., 1851, p. 196 (388 Orig.) ; Setchell
and Gardner. Alg. N.W. Amer, 1903, p. 248; Collins, Holden and
Setchell. Phyc. Bor.-Amer. (Exsicc), no. 828.
The type of Elachistea lubrica Rupr. came from the Ochotsk Sea,
but Ruprecht states that specimens from Russian Lapland are in
close agreement. The most typical specimens seem to grow upon
species of Halosaccion and Rhodymenia. Specimens from Yakutat
Bay collected by Saunders (Phyc. Bor.-Amer., no. 828) and by Albin
Johnson as well as at Orca by Setchell, seem to agree well with speci-
mens distributed from Spitsbergen by Kjellman and from Mehavn in
Finmarken (Phyk. Univ., no. 366) collected by Foslie. The free fila-
ments taper both above and below as in E. fucicola, but the paraphyses
are less curved, only slightly, if at all, constricted at the dissepiments,
and the upper cells are inclined to be broader than high.
14. Gonodia Xieuwland
Fronds minute, tufted, composed of a mass of colorless, densely
intertwined filaments, mostly penetrating the host, giving rise to a
dense mass of erect assimilating filaments and "hairs," at least at
times; ' paraphyses " wanting; reproduction by zoosporangia and
gametangia.
Xieuwland, Critical Notes IX, 1917, p. 30 ; Setchell and Gardner,
.Alar. Alg. Gulf Calif., 1924, p. 722
.
505
; Myriactis Kuetzing, Phyc. gen..
1843, p. 330.
The distinctions between Gonodia and Elachistea are not always
readily discernible in all of the species. In the younger stages of some
of the species of Elachistea, and at times in the older stages, the basal
portion, especially if it penetrates the host, is of about the same degree
of compactness as it is in the mature stages of the species of Gonodia.