450 
PACIFIC SCIENCE, Vol. VIII, October, 1954 
tetrasporangia in stichidia-like, fully corticated 
fertile branches. Unlike the type material, 
these specimens have short internodes below, 
rarely longer than half the diameter, and are 
shorter and less lax throughout. These re- 
ductions and other seemingly minor differ- 
ences are presumed due to the greater aggita- 
tion in the Nha Trang habitat compared to 
Kawasa where the type grew on reef sand. 
Cystocarpic examples are more erectly tufted 
than tetrasporic ones, 
Ceramium equisetoides N akamura (1950: 15), 
non C equisetoides Dawson (1944: 320), is 
related here but is dichotomously branched 
and has semiemergent tetrasporangia. 
Ceramium sp. 
Fig. 56^ 
A small Ceramium was found growing with 
Gelidium pusillum in felted spots on shore 
rocks at Sta. 1 (11067). It was attached by 
multicellular rhizoids from a creeping, pros- 
trate basal filament from which erect, curved 
axes arose. All the plants seen were antheridi- 
al. In habit and characters of nodal cortication 
this plant agrees with Ceramium mauritianum 
G. Feldmann, in B^rgesen (1952: 49, fig. 25 
la-d, 25 Ila, b), and further examination of 
it should be made with that species in mind. 
Griffithsia tenuis C. Agardh 1828: 131 
(Venice, Italy); Abbott 1946: 441, pi. 3, 
LOCAL distribution: a few tetrasporic fil- 
aments mixed with Centroceras, Sta. 9 (11319); 
abundant with Champia parvula, dredged, 
without other data (11138a). 
The form, dimensions, and tetrasporangia 
agree with this species as known from various 
other warm-water localities in the Pacific. 
Griffithsia metcalfii Tseng 1942^: 111, figs. 
5-9 (Hainan, China) 
Fig. 56/f, / 
LOCAL DISTRIBUTION: Only a few filaments 
were found, all sterile and apparently im- 
mature, • creeping among other small algae 
taken from coral heads dredged in 2-7 m., 
Sta. 2 (11279a, 11374). 
The material under 11374 is better devel- 
oped and seems to agree in vegetative char- 
acters with G. metcalfii, especially with the 
smaller celled variety suhsecundata, which is 
described as of creeping habit with frequent 
rhizoids. In view of the absence of repro- 
ductive material this identification must be 
considered tentative. The specimens show re- 
semblance also to G. ovalis Harvey, as inter- 
preted by Abbott (1946). 
Neomonospora pedicellata var. tenius 
Feldmann-Mazoyer 1939: 8, fig. 1 (Villa- 
france, France). Monospora indica Bprgesen 
1931: 12, fig. 8 
Fig. 56^ 
LOCAL DISTRIBUTION: Entangled with other 
filamentous algae growing on a coral rock 
dredged from 5-7 m. depth off the north end 
of lie de Tre (11279). 
The present material, which consists of por- 
tions of two thalli, agrees closely with Bpr- 
gesen’s small Indian plant. The type of 
Neomonospora pedicellata var. tenuis is much 
Fig. 57. Dasyopsis pilosa: Habit, X 1.1. 
