395 
Marine Plants of Nha Trang — Dawson 
LOCAL distribution: On coral rocks, Sta. 
3 (11214); on coral dredged in 2-3 m., Sta. 
2 (11390). 
Pseudochlorodesmis furcellata (Zanard.) 
B0rgesen 1925: 78, figs. 30-34; Hamel 
1931: 401, fig. 21b; Feldmann 1937: 237, 
figs. 33, 34. Bryopsis furcellata Zanardini 
1843: 60 (Adriatic Sea) 
Fig. 11c 
LOCAL DISTRIBUTION: A small amount en- 
tangled with Chlorodesmis from coral partially 
embedded in mud at 2-3 m. off Cau Da 
(11385). 
The few filaments detected are sterile and 
somewhat incomplete as to basal parts, but 
agree in all essential characters with this spe- 
cies as described and illustrated by the several 
authors indicated above. Like the Mediter- 
ranean type variety, these plants increase in 
Fig. 12. Halimeda opuntia: A small portior 
clump, X 2.7. 
diameter from about 60-80 )U near the base 
to 125 ju above. The tiny chloroplasts are oval 
and a little larger (about 4 g) and less elongate 
than those illustrated by Feldmann. 
Avrainvillea erecta (Berk.) A. Gepp and 
Ethel Gepp 1911 : 29, figs. 84-89. Dichonema 
erecta Berkeley 1842: 157, pi. 7, fig. 11 
(Philippines) 
Fig. 13^ 
LOCAL DISTRIBUTION: Scattered and solitary 
on sandy flats, Sta. 4 (11162); in silty pools, 
Sta. 11 (11404). 
The simple, erect habit and the yellow- 
orange color of the filaments are distinctive. 
The specimens under 11404 are of softer tex- 
ture, the filaments being less compacted and 
free on the margins. 
Udotea javensis (Mont.) A. Gepp and Ethel 
Gepp 1904: 363. Rhipidosiphon javensis yion- 
tagne 1842: 15 (Java) 
Eig. 13^, c 
LOCAL DISTRIBUTION: Frequent on coral 
dredged in 2-3 m., Sta. 2 (11365); observed 
in abundance on intertidal rocks and coral 
fragments, Sta. 11. 
Codium geppii O. C. Schmidt 1923: 50, fig. 
33 (Malaya); Bprgesen 1946: 49, figs. 
195-199 Pig ,3^ 
LOCAL DISTRIBUTION: Rare, Sta. 3 (11207); 
infrequent on living and dead coral in 2-3 
m., Sta. 3 (11386, 11442); CCi Lao, col. R. 
Serene, May 4, 1950. 
This is apparently the only Codium species 
in the area and is nowhere abundant during 
the January-March season. 
Halimeda opuntia (L.) Lamouroux 1816: 
308. Corallina opuntia Linnaeus 1758: 805, 
in part (Mediterranean Sea) 
Fig. 12 
