Marine Chlorophyta of Hawaii, II- — GILBERT 
bor, Hawaii, May 21, 1959; 9991 , Palema.no Pt., 
at S end of Kealakekua Bay, Hawaii, June 1, 
1959; 10128 , ca. 3 miles NE of Wailua, Molo- 
kai, June 7, 1959. 
22. Cladophora fascicularis (Mertens) Kiitzing, 
1843, p. 268. 
This species is relatively common and is fre- 
quently found attached or free-floating in the 
wash along the shore. In its typical form (Fig. 
4, C) it is easily distinguishable from C, inserta 
f . ungulata ( Brand ) Setchell, but there are 
many intermediates to suggest that the two spe- 
cies may be the same, as suggested by Bprgesen 
(1948:8) who still listed them separately. Cer- 
tainly the extremes are readily recognizable. 
COLLECTIONS: Gilbert 9126 , Kahana, Maui, 
March 22, 1959; 9171, Camp 1, Sprecklesville, 
Maui, March 23, 1959; 9189, Maska, Maui, 
March 23, 1959; 9297 , Maalaea Boat Harbor, 
Maui, March 25, 1959; 9708, Nawiliwili Boat 
Harbor, Kauai, April 30, 1959. 
23. Cladophora hemisphaerica Gardner, in Col- 
lins, Holden, and Setchell, Phyc. Bor.- 
Amer. (Exsicc), no. 2240 (nomen 
nudum), in Collins, F. S., 1918, p. 83 
( descr. ) . 
These plants rather closely follow Gardner’s 
description. They were more or less crowded 
on a horizontal rock surface and appear as dense, 
hemispherical, dark green tufts, 1-2 cm in di- 
ameter. The lower branches have cells to 65- 
70 /x diam, 1-3 diam long, and the branches 
are widely divergent. Branchlets in outer part 
of the thallus have cells to 45-70 /x diam, with 
the branches less divergent. 
COLLECTION: Gilbert 9946, on horizontal 
rock surface washed by waves, Kahaluu Park, 
Hawaii, May 26, 1959. 
24. Cladophora inserta f. ungulata (Brand) 
Setchell, 1926, p. 75, pi. 22. 
In its typical form (Fig. 4, B) this plant is 
easily separated from C. fascicularis on the basis 
of the much smaller diameter of the ultimate 
segments and the characteristic curving of the 
terminal branchlets. Figure 4, A was drawn 
from a collection containing plants which, while 
maintaining the curved aspect of the terminal 
branchlets, are as large as C. fascicularis. 
489 
Hawaii is the type locality for this form of 
C. inserta. It was first described by Brand (1905, 
p. 180, pi. 5, figs. 10, 11 ) as C. mauritiana var. 
ungulata from material collected by Tilden. 
COLLECTIONS: Gilbert 9010, between Elks’ 
Club and Natatorium, Waikiki, Honolulu, Oahu, 
March 11, 1959; 9022, in wash, Waikiki, Ho- 
nolulu, Oahu, March 14, 1959; 9148 and 9149, 
Kalama Park, Maui, March 23, 1959; 9373, in 
shallow water, near shore, near Laie Pt., Oahu, 
April 4, 1959; 9479, on Natatorium wall, Wai- 
kiki, Honolulu, Oahu, April 15, 1959. 
25. Cladophora socialis var. hawaiiana Brand, 
1905, p. 182. 
This species (Fig. 4, D) is common in warm, 
shallow tide pools as soft, oval, greyish-green, 
spongy masses. It is a species having wide dis- 
tribution. 
COLLECTIONS: Gilbert 9032, on sides of tide 
pools on bench of old lava flow where washed 
by high waves, Hanauma Bay, Oahu, March 19, 
1959; 9230, between Hookipa Park and Paia, 
Maui, March 24, 1959; 9333, from tide pool at 
Spouting Horn, Kauai, April 24, 1959; 9741, 
from pools in basalt rock at Poipu Beach Park, 
Kauai, May 2, 1959; 9813, from tide pools in 
lava, Kapaa Park, Hawaii, May 21, 1959; 10083 , 
3 miles NE of Wailua, Molokai, June 6, 1959. 
26. Boodleopsis hawaiiensis sp. n. 
Fig. 5 
Planta parva siphonacea viridis, pulvillos 
coarctos in arena in rimis umbrosis fossarum 
lavae 7-10 metra super aquae altitudinem aestu 
alto efficiens; filamenta inferiora (obtecta) ali- 
quantulum laxa, ( plerumque ) dichotome ra- 
mosa, sine constrictionibus ad bases ramorum, 
pauciores chloroplastos quam in parte plantae 
superiore habentia, diametro varians, ab 11- 
60 g, membranis crassitudine variantibus, saepe 
striatis; nonnulli rami inferiores descendentes, 
satis tenues, fere sine colore, aspectu rhizoidei 
facti, rami rhizoidei, autem, ubilibet in planta 
saepe reperti; filamenta superiora diametro uni- 
formiora, 16-23 (30) /x lat., chloroplastis par- 
vis rotundis ad ovatos, ut videtur sine pyrenoi- 
deis, conferte impleta, ramificatio di- trichot- 
oma ad manifeste lateralem, constrictionibus ad 
bases ramorum manifestis; constrictiones sec- 
ondaria inter ramos sparsae aut nullae. 
