96 
PACIFIC SCIENCE, VoL XXII, January 1968 
and D. 22369=5, both tetrasporic, cystocarpic, in 
algal turf and on other algae, seaward side of 
jetty, Maalaea, Maui, legit H., T., and B., Apr. 
19, 1965 ; D. 13427.1, on intertidal basalt ledge, 
west lip of Pohoiki Bay, Island of Hawaii, Nov. 
10, 1956; D. 20193.5, D. 20209=1, in algal 
turf, Kaena, Puna, Island of Hawaii, Mar. 19, 
1965; JOHNSTON ISLAND — H. 65-106.5, tetra- 
sporic, cystocarpic, at a depth of 1—2 m and 
20 m shoreward from the outer reef margin, 
north of North I., legit. R. S. Jones, Apr. 22, 
1965; T. 1287, at a depth of 12-13 m, legit 
E. Murchison, Aug. 19, 1965; line islands — 
Da. 19532, 19539, tetrasporic, Palmyra Atoll, 
Oct. 1958; TUAMOTU ARCHIPELAGO— D. 
11215.3, tetrasporic, D. 11217A, on a stump 
at a depth of about 5 ft, near the lagoon reef 
transect, Ngarumaoa, Raroia Atoll, legit M. S. 
Doty and Jan Newhouse, July, 1952; society 
islands — D. 12103.1, cystocarpic, Arue Point, 
Tahiti, Sept. 15, 1952; collections by J. Randall; 
D. 14699, from the reef flat, Matavai Bay, 
Tahiti, Apr. 2, 1956 and D. 14700 from rocks 
at the water’s edge, Popetai Bay, Moorea, May 
30, 1956; American samoa — T. 678A, on 
Dictyosphaeria, in shallow water near shore, 
Vatia Bay, Tutuila I., legit R. Buggeln, Aug., 
1964; T. 779.1, cystocarpic, male, in basalt 
tidepools near Onenoa, Tutuila I., legit R. Bug- 
geln, Aug. 13, 1964; Fiji islands — D. 1212212, 
cystocarpic, on Caulerpa sp., Navuevu Cuvu, 
Singtoka, Viti Levu I., Sept. 22, 1952; gilbert 
islands — D. 18897 A, in a shallow passage 
between the lagoon and the ocean, Abemmama 
Atoll, legit M. J. Cooper, July 1962; marshall 
islands — D. 9215 B, tetrasporic, on coral, 
transect area, Ine Village, Arno Atoll, legit 
Leonard Horwitz, July 30, 1951; D. 18551.1, 
tetrasporic, Parry I., Eniwetok Atoll, Jan. 27, 
1959; G. 608.1, tetrasporic, cystocarpic, male, 
G. 610 , male, and G. 612, male, in the lagoon 
at a depth of 19 m, Eniwetok Atoll, Sept. 1955 ; 
CAROLINE ISLANDS (all legit Ernani Menez, 
June to Sept. I960) — D. 15546.1, on Sar gas- 
sum, D. 15556.1, cystocarpic, male, on Sargas- 
sum, D. 15557.1, tetrasporic, on Padina, D. 
15559.2, tetrasporic, on Acanthophora, D. 
15563.1 and 15566 on Padina, D. 15567.1, 
male, D. 15586.3B, tetrasporic, cystocarpic, on 
Padina, all eight collections from Koror I., 
Palau Group; D. 15576.1, cystocarpic, male, 
D. 15645.1, cystocarpic, D. 15656.1B, tetra- 
sporic, on Sargassum sp., from Pulu Anna I.; 
D. 15721.2, D. 21737.1, tetrasporic, on dead 
coral, Mantapeitak I.; D. 21709.5 and D. 
21838.1, tetrasporic from Epwelkapw, Ponape 
I.; D. 21796.5, tetrasporic, cystocarpic, eastern 
side of Peipalap Peak, Ponape I.; D. 21046, 
procarpic, south end of Moen I., Truk Islands; 
D. 23020, on coral pebbles on the reef at Utwa 
Village, Kusiae I., D. 23207.4, on Microdictyon, 
south tip of Sorol I.; D. 15879.1 and D. 23854, 
tetrasporic, cystocarpic, Falas I., Truk Islands; 
PHILIPPINE ISLANDS — D. 18070 A, cystocarpic, 
south of Sava wharf, Davao, Mindinao, legit 
E. Menez, June 26, 1958; D. 18103A, on other 
algae at a depth of 3-6 ft, near Davao, Min- 
dinao, legit E. Menez, June 22, 1958; D. 
18227 A, on Avrainvillea, Davao, Mindinao, 
June 24, 1958; several collections by D. P. 
Abbott, Feb.-Mar., 1958 as follows: on other 
algae, Tijitiji Reef, Tawitawi I., Sulu Sea; tetra- 
sporic, southeast shore of Faganak I., Turtle 
Group, Sulu Sea; male, on Tydemannia, Laa, 
Tawitawi I., Sulu Sea; Calandorang Bay, Bala- 
bac; Mariana islands — H. 65-75, awash at 
Agat, Guam, legit Mrs. Leonard Nelson, May, 
1965. viet nam — Judging by Figure 60f. of 
Dawson (1954:455) it seems likely that his 
Polysiphonia sp., Da. 11329, is P. upolensis. 
A collection by Cyril Crossland 7259 (C. 
792042), and Crossland 7153 (C 791870) 
from Pa’ea, Tahiti, Jan. 1929, both identified 
as P. tongatensis, are P. upolensis, as is also a 
collection, July-Sept. 1964 by David Sigee, No. 
29D, from the lagoon reef of Gan I., Addu 
Atoll, Maidive Islands in the Indian Ocean. 
This species is very common in the Caroline 
Islands and the Philippine Islands. It seems 
closest to P. sphaerocarpa from which it differs 
in the irregular distribution of trichoblasts and 
scar-cells, in the lack of enlarged cells on the 
ostiolar rim of the pericarp, in branches arising 
at more distant intervals, and probably in the 
sterile tip of spermatangial branches. 
ACKNOWLEDGMENTS 
The writer acknowledges with thanks the 
opportunity to use the facilities of the Depart- j 
ment of Botany at the University of Hawaii, 
and the services of the departmental artist. He 
