554 
PACIFIC SCIENCE, Voi. XXII, October 1968 
corallines, legit Ernani Menez, June 10-12, 
I960 ; Indonesia — a collection by A. Weber -van 
Bosse (as Herposiphonia tenella'), on Gelidiella 
sp., from Maumeri L, Flores, kindly loaned from 
the Rijksherbarium, Leiden; an unnumbered col- 
lection, slender form, on a sea grass, Tandjung 
Gul, Singapore, Jan. 1965 ; maldive islands — 
Ha. 5-2B-119C-54E, F, Ha. 52B-119C-63A, 
southeast and south of Himmafuri I., Male 
Atoll, Mar. 17, 1964; Ha. 19-21-1, tetrasporic, 
on reef at a depth of 3 ft, Dinidu Faro, Male 
Atoll, Apr. 19, 1964; Ha. 24-21-132-16 and 
17, on Amphiroa sp., reef flat at a depth of 4 ft, 
Walla Faru, South Nilandu Atoll, Apr. 24, 
1964; Ha. 29-2P-12, spermatangial, in Thalas- 
sia beds on a small island south of Fadu I., 
Addu Atoll, May 8, 1964; David Sigee no. 78, 
Gan I., July-Sept. 1964. 
A collection by E. Y. Dawson, no. 7360C, 
cystocarpic, Summerland Keys, Florida, May 28, 
1949, seems readily referable to H. parca. These 
specimens bear several strictly terminal cysto- 
carps, which are strongly urceolate at maturity, 
measuring 480p in diameter and 640p in length. 
Herposiphonia parca var. interrupt a var. nov. 
Fig. 6 
With the features of the species but with a 
bare node generally occurring between the first 
and second determinate branches in a distal 
direction from a given indeterminate branch. 
Algae proprietates speciei praebentes, plerumque, 
autem, nodum nudum inter ramos determinates pri- 
mos secundosque habentes, a ramo indeterminato dis- 
taliter positum. 
type collection: D. 22369, tetrasporic, in 
algal turf and on Gracilaria, Maalaea Jetty, 
Maui, legit H., T., and B., Apr. 19, 1965. The 
type collection is represented by a glucose slide 
mount and fluid-preserved material. This variety 
is known only from collections in the Hawaiian 
Islands, where it is common. Mature reproduc- 
tive structures were not observed. 
COLLECTIONS examined: D. 10074.1, in 
front of stream mouth, Moloaa Bay, Kauai, legit 
Jack Randall, Feb. 2, 1952; D. 10281, reef flat, 
Hanalei Bay, Kauai, legit Jack Randall, Feb. 7, 
1952; D. 8066, D. 8077, D. 8083, Kawela, 
Oahu, Oct. 16-17, 1950; D. 8215.1, Mokuleia, 
Oahu, Oct. 15, 1950; D. 8428, D. 8509.1, D. 
8519.1, on other algae, Sand Island, north end 
of Kaneohe Bay, Oahu, Nov. 24, 1950; D. 
8837.1, on other algae, midtide level, Manana 
I., Oahu, Apr. 22, 1951 ; D. 9742.1, on Lauren - 
cia sp., near Sans Souci Beach Laboratory, Wai- 
kiki, Oahu, Jan. 13, 1952; D. 9947.1, with 
immature cystocarp and spermatangial stichidia, 
near Sans Souci Beach Laboratory, Waikiki, 
Oahu, Mar. 21, 1952; D. 9982.1, D. 9983.1, on 
rock shelf, in front of Marine Laboratory, 
Kaneohe Bay, Oahu, Mar. 28, 1952 ; D. 10583.1, 
on Jania sp., Sans Souci Beach Laboratory, Wai- 
kiki, Oahu, Mar. 14, 1953; D. 12236, Mokuleia, 
Oahu, Nov. 9, 1952; D. 12438.1, on Gelidium 
sp., in front of Ala Moana Park, Honolulu, 
Apr. 12, 1954; D. 12746.1, on Champia sp., 
Laie, Oahu, Jan. 16, 1955; D. 13014.1, Koloa, 
Oahu, Oct. 30, 1955; D. 19305.1, on Hypnea 
sp., awash, Sans Souci Beach Laboratory, Wai- 
kiki, Oahu, Mar. 7, I960; H. 65-7, on Micro- 
dictyon sp., Makaha Pt, Oahu, Feb. 28, 1965 ; 
an unnumbered collection by Gavino Trono, near 
the outer reef margin, on other algae, Kaaawa, 
Oahu, Nov. 28, 1964; D. 191 37J2, on Padina 
sp., dredged 15-20 fa off Ilio Pt., Molokai, 
Sept. 7, 1959; D. 22409-2, in algal turf, near 
McGregor Pt., Maui, legit H., T., and B., Apr. 
19, 1965; D. 22411, on Laurencia sp., near 
McGregor Pt., same date and collectors; D. 
22484, on other algae, basalt reef flat north of 
Kahana, Maui, legit H., T., and B., Apr. 20, 
1965; D. 13442.2, with Champia sp., on basalt 
ledge, west lip of Pohoiki Bay, island of Hawaii, 
Nov. 10, 1956. 
Herposiphonia subdisticha Okamura. Okamura 
(1899:11) 
Fig. 11 
Decumbent algae 2 cm or more long, attached 
by frequent unicellular rhizoids, with distichous 
or nearly distichous branches, with a determinate 
or an indeterminate branch on every node and 
with 3 alternating determinate branches between 
2 successive alternating indeterminate branches; 
determinate branches 500-600p long, 70-1 OOp 
in diameter, with mostly blunt apices and nar- 
rowed at the base, slightly to strongly curved 
toward the tip of the bearing branch, and often 
slightly curved toward the substratum, composed 
of 10-12 segments mostly shorter than broad, 
