Marine Plants of Nha Trang — DAWSON 
like both the Indian and the Viet Nam plants, 
except that its monosporangia are sessile and 
more elongated. J. Feldmann more recently 
(1942^) has referred specimens from Banyuls, 
France, to this variety but has noted that they 
have pedicellate monosporangia as in the typi- 
cal variety of the species. This would suggest 
that the small Indian, Vietnamese, and Medi- 
terranean plants are representative of one 
variable species. B0rgesen, himself, expressed 
doubt as to the distinctness of M, indica, and 
I now venture to place it in synonymy. 
Dasya pedicellata (Ag.) C. Agardh 1824: 
211; Taylor 1937: 355, pi. 54, figs. 1-4. 
Sphaerococcus pedicellatus C. Agardh 1822: 
321 (Atlantic Europe) 
Fig. 56/ 
LOCAL DISTRIBUTION: On a coral rock 
dredged from 5-7 m. off the north end of 
lie de Tre (11274). 
Although these specimens are small, reach- 
ing only about 2.5 cm. in hHght, they are 
fully developed and fertile. Comparison with 
liquid-preserved material of D . pedicellata from 
the Atlantic and from Pacific Mexico has er- 
vealed no significant morphological differ- 
ences. They seem to be in full agreement with 
the illustrations given by Taylor (/.c.) and by 
other authors. 
Dasyopsis pilosa Weber van Bosse 1923: 
377, fig. 137 (New Guinea) 
Figs. 56/, 57 
LOCAL distribution: a single clump about 
3 cm. high found on a coral rock at — 0.5 
foot tide level, Sta. 1 (11127). 
The specimen is antheridial and agrees well 
with Weber van Bosse’s illustration and de- 
scription. The dichotomous branching, the 
thick, cylindrical axes (to 2 mm. below), and 
the long, slender pseudolaterals are distinctive. 
Taenioma perpusillum (J. Ag.) J. Agardh 
1863: 1257; Tseng 1944c: 215, pi. 25; Oka- 
mura 1930, leones 6, pi. 264, figs. 17-19. 
451 
pi. 265, figs. 5-9. Polysiphonia perpusilla J. 
Agardh 1847: 16 (Pacific southern Mexico) 
Fig. 58^ 
LOCAL DISTRIBUTION: Among other minute 
algae, Sta. 2 (11082a). 
Caloglossa adnata (Zanardini) De Toni 
I9OO: 730. Delesseria adnata Zanardini 1872: 
141, pi. 5, B, f 1-3 (Sarawak, Borneo) 
Fig. 58/^ 
LOCAL DISTRIBUTION: Closely adherent on 
roots of mangrove, Sta. 12 (11392). 
Determination by Dr. Erica Post. 
Hypoglossum attenuatum Gardner 1927: 
104, pi. 20, fig. 3, pi. 35, 36 (Gulf of 
California) 
Fig. 58c 
LOCAL DISTRIBUTION: A few small plants to 
1.5 cm. long were found attached to bits of 
Halimeda from depths of 2-3 m., Sta. 2 
(11369). 
These plants are antheridial. They agree in 
habit and in the attenuation of the blades with 
the type material so amply illustrated by 
Gardner. They do not seem referable to the 
much larger H. spathulatum Kiitz. 
Lophosiphonia villum (J. Ag.) Setchell and 
Gardner 1903: 329; Hollenberg 1942^: 535, 
figs. 11-13. Polysiphonia vilhm J. Agardh 
1363: 941 (Tropical America) 
Fig- 58/, g 
LOCAL DISTRIBUTION: Creeping on old cor- 
al, Sta. 7 (11246). 
The erect, quadrisiphonous filaments of 
this plant reach somewhat over 3 mm. in 
height. 
Lophosiphonia obscura (Ag.) Falkenberg 
1901: 500; B^rgesen I9I8: 294, figs. 292- 
294. Hutchinsia obscura C. Agardh 1820: 108 
(Adriatic Sea). Kiitzing, Tab. Phyc. 13, pi. 
40a, b (as Polysiphonia obscura) 
Fig. 58V, e 
