416 
PACIFIC SCIENCE, Voi VIII, October, 1954 
Fig. 27. a, Liagora divarkata: Habit, X 0.9. b, Liagora orkntalis; Habit of part of a plant, X 1. 
LOCAL DISTRIBUTION: On coral fragments, 
Sta. 1 (11111). 
Liagora ceranoides Lamouroux 1816: 239 
(Virgin Islands); Tseng 1941: 271, fig. 5; 
Yamada 1938: 20, pi. 6 
Fig. 28^ 
LOCAL DISTRIBUTION: On coral fragments, 
Sta. 1 (11108); Sta. 2 (11447). 
Actinotrichia fragilis (Forsk.) B0rgesen 
1932^: 6, pL 1, fig. 4. Fucus fragilis Forskal 
1775: 190 (Red Sea). Actinotrichia rigida 
(Lamx.) Decaisne 1842: 118 
Fig. 28^ 
LOCAL DISTRIBUTION: Scarce, forming loose, 
wiry clumps about 2.5 cm. high on coral 
heads from 2-3 m., Sta. 2 (11388); at Cii 
Lao, May 4, 1950 ( coll. R. Serene). 
Key to the Species of Galaxaura 
1. Thallus strongly flattened. ............ 
G, vietnamensis 
Thallus cylindrical 2 
2. Thallus smooth, without extended assimi- 
latory filaments .......... G, fastigiata 
Extended assimilatory filaments present 
over entire thallus 3 
3. Assimilatory portion homogeneous, com- 
posed only of extended assimilatory fil- 
aments ................ G, filamentosa 
Assimilatory portion heterogeneous, com- 
posed of both extended and short assimi- 
latory filaments G. fasciculata 
