Cladophora arcta (Dillwyn) Kütz.

Olafloohora arcta f. comlutinata, f. nov.
Collins; Setchell Sc Gardner, Univ. Calinornla
Publ. Bot. 1:225. 31 Mr 1903•
Filaments adhering in dry in? into Minted tifts; descend-
ing rhizoidsplent/iful. In addition to the regular, erect,
tljnt "branches, there are at the "base of the older plants sort
panent lateral branches with acute terminal cells.
On stones and rocks, litoral zone, 8t>. Iichaelr Alask
W. A. S., Ho. 5'>55x‘.; near Dutch Harbor, Maknak Island., $a'.
of Unalaska, Alaska, ii. 0. McGregor, Ho. 5693* > S. an
A. A. L., No. 40801; Karluk, Kadiak Island, A lasta., ^1. A.
Nos. 50681, 50 69’.; Uvak Bay, Kadiak Island, Alaska, A. i
and A. A. L., No. 5oB6*.; Es^vnalt, E. C., IL L. G., Ho. 3
Channel .docks, west of Seattle, lash., 11. L. Ho, 35^';
Deer Harbor, Ban Juan Island, 'Wash., H. L. G.,Ho. 202*. It?
tered for.n).
The typical G_. arcta shows a flaM.late or nearly c!
lar outline in the minted specimen, the individual fila
teing ^aite free. The present fora has mte a (Liffarflr
the filaments uniting in tufts like a magnified Symploci
acute lateral 'branches show a tendency toward C. shines
but are not regularly curved or circinate as in the lat
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