Marine Algae from Eniwetok — Dawson 
123 
Fig. 29. a, Dasya mollis , prox.: Habit of a plant of D. 13876, X 4. b, Dasyopsis geppii: Habit of a young plant of 
D. 13728 as seen from below, X 3.5. 
Taenioma perpusillum ( J. Agardh) J. Agardh; 
Dawson 1954: 451, fig. 58a 
D. 14035c. P. 2833a, IV 2 mi. off Igurin Is. 
in the lagoon at 50 ft., 3/16/55. 
Hemitrema fragilis (Harvey) comb. nov. Mar- 
tensia fragilis Harvey 1954: 145 (Ceylon); 
Dawson 1956: 56, fig. 58 
Fig. 28 
D. 13737, 13801, 14008. Inasmuch as Silva 
(1952: 291) has pointed out that " Hemitrema 
seems to be the earliest available name for 
Martensia ” which is illegitimate, this new 
combination is called for here. 
Dictyurus purpurascensboty\ Dawson 1956: 57; 
Taylor 1950: 143, pi. 78, fig. 1 
D. 13773. P. 2836, Parry Is. seaward reef 
edge near EMBL, 4/4/54. 
Dasya iyengarii B^rgesen 1937: 345, figs. 16, 
17 (Pam ban Bridge, South India) 
Fig. 22 b 
D. 13608, 13624, 13803, 13890, 14051. 
These specimens are somewhat variable in 
stature and in detail of branching, but seem 
to be essentially identical with the south In- 
dian plant. The epiphytic specimens under 
D. 13608 are especially like the type. Saxi- 
colous specimens under D. 13624 are pro- 
vided with somewhat more attenuate and less 
curved and hooked penicilli, but appear other- 
wise to be like the epiphytic form. The best 
stands of the plant occur near the margin of 
the seaward reefs where the species may be 
dominant in some areas. 
Dasya mollis Harvey, prox.; Harvey 1853: 62 
(Key West, Florida); Taylor 1928: 173, pi. 
26, fig. 13 
Fig. 29 a 
D. 13876. This small, completely corticated 
plant seems best referred here, but the sterile 
material is insufficient for positive identifica- 
tion. It differs from Atlantic material mainly 
in the shorter cells of the ramelli. 
Dasya adhaerens Yamada 1944: 43, pi. 7, fig. 1 
(Ant Atoll, Caroline Islands); Taylor 1950: 
141, pi. 79, fig. 1 
T. 46-392. Not collected again. 
Dasyopsis geppii Weber van Bosse 1913: 130, 
pi. 13, figs. 18-20, pi. 14, fig. 33 (reefs and 
to 20-25 fathoms at four Indian Ocean 
localities indicated) 
Fig. 29 b 
D. 13728, 14007. Except for the more pro- 
nounced peltate form of some, these agree 
very well with the account of the "Sealark 
Expedition” material. Some of them show a 
