424 
PACIFIC SCIENCE, Vol. VIII, October, 1954 
18, pL 35d-f. Acrocarpus capitatus Kiitzing, 
Tab. Phyc. 18, pi. 35a-c. Sphaerococcus in- 
tricatus C. Agardh 1822: 333 (Ravak Island) 
Fig. ^Aa-d 
LOCAL DISTRIBUTION: Forming small, sparse 
tufts and clumps 1-2 cm. high on coral frag- 
ments, Sta. 7 (11243); to 3.5 cm. high on 
rocks, Sta. 11 (11409); Xa Cu Bay, lie de 
Tre, Aug. 23, 1949 (coll. R. Serene). 
These specimens are variable in diameter 
and in the degree of branching, compression, 
and attenuation of some of the erect branches, 
but in general agree well with the illustrations 
of Kiitzing and of Yamada and Tanaka. The 
swollen, terminal tetrasporic stichidia are dis- 
tinctive. The branches range mostly between 
175 and 250 some becoming attenuated to 
about 100 ju. Antheridia seem not to have been 
illustrated before. 
A fragment of Kiitzing’s type material of 
Acrocarpus capitatus from New Caledonia has 
been sectioned and found to agree well with 
the Viet Nam collections. I venture to place 
that name in synonymy. 
Fig. 34. a-d, Gelidiopsis intricata: a, Habit of part of 
a plant of 11243, X 4,5; h, part of a tuft of 11409, 
X 2; f, a tetrasporangial stichidium of the same, X 20; 
d, a capitate antheridial branch-apex of 11243, X 17. 
Wurdemannia miniata (Lmk. & DC) Feld- 
mann and Hamel 1934: 544, figs. 9-11; 
Dawson 1953: 86. Fucus miniatus Lamarck 
and DeCandolle 1815: 6 (Mediterranean 
France) 
Fig. 35 
LOCAL DISTRIBUTION: Forming dense, wiry 
mats on coral fragments, Sta. 13 (11437); 
tufted, to 2 cm. high, Sta. 4 (11185); on coral 
fragments, Sta. 7 (11242). 
The branches range in diameter from 140 
to 230 ju, although some small forms may be 
somewhat less than 100 fj, in diameter. No 
apical cell is present. 
Hildenbrandia prototypus Nardo 1834 
675 (Adriatic Sea); Dawson 1953: 95, pi. 
7, fig- 4 ^ 
LOCAL DISTRIBUTION: Forming thin, deep- 
red films on upper intertidal rocks and stones 
in tide pools, Sta. 1 (11073); Sta. 11 (11410). 
Peyssonelia rubra var. orientalis Weber 
van Bosse 1921: 270, figs. 86-89 (Indo- 
nesia); Dawson 1953: 104, pi. 10, figs. 8, 
9; Taylor 1950: 121 
Fig. 36c 
LOCAL DISTRIBUTION: Forming a firmly ad- 
herent, thin (60-70 n thick) reddish crust on 
coral fragments, Sta. 1 (11070); bright red- 
dish crusts 150-200 ju thick on a shell dredged 
from 5 m. off Cau Da (11123). 
The material examined is sterile but agrees 
vegetatively with the accounts of this species 
from Indonesia and from Mexico. 
Peyssonelia gunniana J. Agardh 1876: 387 
(Eastern Australia) ; Weber van Bosse 1921 : 
272, fig. 90 p.g 
