Ulva profunda W.R.Taylor

Ulva profunda Taylor n. ap. Carnegie
Inst. Wash. 379:57. pi. 3. f. 2,
3,	16, 17. 1928.
plant at first ovate, attached by a cuneate "base
and a stall? about 1 mm.long; later widely expanded,
delicate, irregular, to 4 dm. or more in diameter;
regularly clathrate, the openings generally 0.5 to
1.5	cm. but reaching 6 crp. in diameter; cells of' the
membrane angular, variable in size, averaging about
18 to 36 ji in diameter, containing 1(rarely 2) chroma-
tophores which nearly cover the face of the cell in
the living state and contain 1,rarely 2,py^enoids;
thickness of blade 30 to 60 u, cells sub-equal to
broader than high in section', thin-walled; vertical
walls about 0.3. ji thick, outer membrane 1.5 to 2.0 u
thick, cells bounding the openings frequently much
elongate in the plane of the blade, reaching surface
diameters of 18 by 72 p, or more.
liewly described here from Florida.
Dredged in 64.0 to 67. 7 meters off Southwest Channel
v.ith Fallymenia perforata, etc., June 1925, when a small
non-perforate piece, perhaps the same species, appeared
in 14.6 to 18.3 meters. In 1926 a large qnantitjr was ob-
tained in 32.9 meters.
This material was rather pale in color when living,
though darkening on drying. The perforations occur with
such regularity and show such characteristic margining
as to indicate that they are a normal character of the
plant, like the perforations of Agarurn. Two little pieces
showed the basal attachment. The greater part of the mate
ial was of small fragments, but pieces 4 dm. in diameter
were secured.
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