Howe: CHINESE MARINE ALGAE 137 
of this name in the Cowdry list seems to be the first record 
for China. 
CYSTOPHYLLUM THUNBERGII (Mert.) J. Ag. P, 282; C, Sat, $22. 
Yendo (Jour. Coll. Sci. Tokyo 21”: 118. 1909) adopts Otto 
Kuntze’s reference of this species to Sargassum on the ground 
that the receptacles are ‘‘axillary.’’ It seems, however, to 
the present writer that the receptacles are as much terminal 
as axillary and that the plant is rather more at home in Cys- 
tophyllum. 
SARGASSUM CONFUSUM Ag. (?) P, 283 and another without num- 
ber (May 23, 1919); C, 520 pp., “drifted on shore in large 
quantities with Zostera.’’ We have not seen Agardh’s origi- 
nal from Japan. Our more or less doubtful determination is 
based chiefly on Yendo’s figures and descriptions (Jour. Coll. 
Sci. Tokyo 21": 106-112. pl. 14. f. I-12. 1909), and may 
be influenced by Okamura’s doubtful reference of no. 520 to 
this species. However, no. 520 in herb. Cowdry is possibly a 
mixture. 
A specimen from Pei-tai-ho, without number, is about 25 
cm. long and shows a pronounced dimorphism or polymor- 
phism in its leaves. Most of the leaves on certain young 
branches are oblanceolate or obovate, 20-35 mm. long and 
6-17 mm. wide and dentate, while all of the leaves now re- 
maining on longer older branches are narrowly linear or sub- 
filiform, 5-45 mm. long, and subentire. The Pei-tai-ho speci- 
men under no. 283 manifestly represents the terminal parts 
of a plant of the same species, with vesicles, receptacles, sub- 
filiform leaves, and nothing at all to suggest that parts of it 
might bear leaves of a very different character. 
SARGASSUM MICROCERATIUM (Mert.) J. Ag. C, 523, 524. In 
523, the plants are 20-35 cm. long, the basal leaves are linear, 
twisted, 1-2 cm. long, I-1.5 mm. wide, entire or nearly so; 
the upper leaves filiform, 2-4 mm. long, 0.2-0.3 mm. wide; the 
receptacles are fusiform, 2-4 mm. long; the vesicles are 1.5 
mm. wide, ellipsoid or obovoid, apiculate or muticous, on 
pedicels that are often very short but are sometimes longer 
than the vesicles, sometimes showing much variation on a 
single plant. The part bearing the basal leaves is short, only 
2 or 3 cm. long; the rest of the plant is loosely paniculate, 
with numerous slender branches, small vesicles, and rather 
