458 
PACIFIC SCIENCE, Vol. VIII, October, 1954 
8. Thalli short, about 1 cm. high, repeatedly 
subdichotomously branched . . . L. tenera 
Thalli to 2 cm. high, delicate, the axes + 
— percurrent. . . .L. brachyclados, prox. 
Laurencia parvipapillata Tseng 1943^: 204, 
pi. 4 (Hong Kong) 
Fig. 6lg 
LOCAL DISTRIBUTION: Forming low, spread- 
ing groups a few cm. in extent on rocks, Sta. 
9 ( 11312 ). 
The mammillate character of the epidermal 
cells is distinctive. 
Laurencia papillosa (Forsk.) Greville 1830: 
lii; Yamada 1931: 190, pi. 1, figs, a, b. 
Fucus papillosus Votskil 1775: 190 (Red Sea) 
Fig. 61/ 
LOCAL DISTRIBUTION: Sta. 4 (11196). 
Laurencia paniculata (Ag.) J. Agardh 1863: 
753; Yamada 1931: 192, pi. 3, fig. a; Tseng 
1943^: 191. Chondria obtusa var. paniculata 
C. Agardh 1822: 343 (Adriatic Sea) 
Fig. 6lc, d 
LOCAL DISTRIBUTION: On rocks, Sta. 4 
(11200); on coral in shallow water, Sta. 7 
(11252); on rocks, Sta. 10 (11343). 
In referring my specimens to this species, 
I concur with Tseng as to the need of more 
exact information about the Adriatic type of 
L. panlctdata. 
Laurencia obtusa var. densa Yamada 1931: 
226, pi. 17, fig. c (Daibanratsu, Formosa) 
Fig. (Ah 
LOCAL DISTRIBUTION: Tufted, to 4 cm. high 
on rocks, Sta. 8 (11270). 
Although somewhat smaller throughout, 
these specimens seem to be in agreement with 
Yamada’s plant from nearby Formosa. 
Laurencia corymbosa J. Agardh, prox. 
Fig. 61/ 
LOCAL DISTRIBUTION: On rocks, Sta. 9 
(11311). These specimens are dwarfish and 
clearly not fully developed. They seem to 
approach L. corymbosa most closely according 
to Yamada’s key (1931). 
Laurencia articulata Tseng, prox. Tseng 
1943^: 195, pi. 2, figs. 3, 4 (Hong Kong) 
Fig. (2h-j 
LOCAL DISTRIBUTION: Minute, creeping on 
coral rock dredged from 5-7 m. off north end 
of lie de Tre (11282). 
The supposedly characteristic annular scars 
are frequent, and in habit my scant material 
appears to agree with Tseng’s species. How- 
ever, my plants are sexual whereas his were 
tetrasporic. More collections and further com- 
parisons are needed. 
Laurencia pygmaea Weber van Bosse 1913^: 
122, pi. 12, fig. 6 (Chagos Archipelago) 
Fig. (Flk 
LOCAL DISTRIBUTION: Creeping on coral 
fragments from drift, Sta. 2 (11361a). 
I have found only a few sterile plants, but 
they are in good agreement with the de- 
scription by Mrs. Weber. 
Laurencia tenera Tseng 1943;^: 200, pi. 1, 
fig. 6, pi. 2, figs. 5, 6 (Hong Kong) 
Fig. (2b, c 
LOCAL DISTRIBUTION: Forming a low, dense, 
turf-like mass about 1 cm. high, Sta. 8 
(11257). 
These small plants appear to agree with 
Tseng’s L. tenera described from a similar 
habitat at Hong Kong. Cystocarps were not 
reported by Tseng. The branches bearing 
them are considerably smaller in diameter 
than are tetrasporangial branches. 
Laurencia brachyclados Pilger, prox. Ya- 
mada 1931: 216; Pilger 1920: 6, figs. 9, 10 
(Annobon Island, Gulf of Guinea) 
Fig. (\e 
