Marine Plants of Nha Trang — Dawson 
401 
Fig. 15. Dictyota dkhotoma: Habit of part of a narrow and part of a broad form, X 1. 
(11072). At Sta. 9 some closely adherent forms 
were found having a habit suggestive of Kalf- 
sia (11320). 
Dictyota dichotoma (Huds.) Lamouroux 
1809^: 331; Okamura, leones 3: 39, pis. 
111-113; Dawson 1950^: 90. Ulva dicho- 
toma Hudson 1762: 476 (England) 
Fig. 15 
LOCAL DISTRIBUTION: In drift, Sta. 3 
(11093). 
Dictyota friabilis Setchell 1926: 91, ph 13, 
figs. 4-7, pi. 20, fig. 1 (Tahiti) 
Fig. 16^^, h 
LOCAL DISTRIBUTION: Creeping, loosely ad- 
herent, and overlapping, on irregular surfaces 
of coral in 2-3 m., Sta. 2 (11389, 11361). 
The variation in width and form shown by 
these two collections is in good accord with 
the type material from Tahiti. A few repro- 
ductive blades bear undivided sporangia on 
their ventral surfaces. 
Dictyota patens J. Agardh 1882: 93 (warm 
seas: Virgin Islands and Friendly Islands); 
Okamura, leones 3, pi. 104, figs. 1-11 
Fig. I6c 
LOCAL DISTRIBUTION: Scarce, Sta. 4 (11419). 
This material agrees well with the species 
as it is known in southern Japan and the 
Ryukyu Islands. However, Agardh’s type 
material, including both Pacific and Caribbean 
specimens, has apparently not been reviewed 
by any recent authors. 
Padina commersonii Bory 1828: 114 (lie 
