Marine Chlorophyta of Hawaii, II — Gilbert 
6. Enteromorpha Ptuhulosa Kiitzing, 1856. Tab. 
Phyc. VI, p. 11, pi. 32, fig. 2. 
The following collection is assigned to this 
species with considerable uncertainty, especially 
since the cells appear to have 1-3 pyrenoids in- 
stead of but one as usually noted in the litera- 
ture. 
COLLECTION: Gilbert 9705 , attached to clay 
tile at Kauai Boat Club between Kekaha and 
Waimea, Kauai, April 30, 1959. 
7. Monostroma oxyspermum (Kiitzing) Doty, 
1947, p. 12. 
All of the collections listed below appear to 
be one species. Surface views and cross section 
studies were made. The average cell diameter 
is almost the same (about 9 /*) in all collec- 
tions and the thalli (with the exception of Gil- 
bert 9377) are all about 20-25 /x thick. Cells 
were grouped in twos, threes, and fours in sur- 
face view and all appeared somewhat taller 
than wide in cross sectional view, the thickness 
of the membrane external to the cells contrib- 
uting mostly to the variation in thickness of 
the frond. 
COLLECTIONS: Gilbert 9377 , on cement wall 
at high tide level in canal, Ala Moana Park, 
Honolulu, Oahu, April 7, 1959; 9481, wall of 
Natatorium, Waikiki, Honolulu, Oahu, April 
15, 1959; 9785, in quiet water around man- 
grove roots near docking area, Coconut Island, 
Kaneohe Bay, Oahu, May 14, 1959; Menez 722, 
from basalt rocks covered with thin film of 
mud, above high tide line, in back of YWCA 
camp, Kaneohe Bay, Oahu, ( no date ) ; Doty 
17204, highest tidal rocks in pool at Coconut 
Island, Hilo, Hawaii, Dec. 28, 1958; Bernato- 
wicz, A. J. (no number), on stones where Ku- 
liouou stream debouches into Maunalua Bay, 
Oahu, April 8, 1956. 
8. JJlva expansa (Setchell) Setchell and Gard- 
ner, 1920, p. 284. 
This relatively common Diva is characterized 
by having broad unbranched thalli with ruffled 
margins and in having the thalli thicker in the 
middle than at the margins. Thalli of the Ha- 
waiian material reach 30 cm in width and 43 
cm in length, and range in thickness from 40- 
70 /x near the margin and from 75-100 /x in 
the center. Collections were made of attached 
483 
material from cement or rocks in the in :er tidal 
zone and of free-floating material in quiet tide 
pools. 
COLLECTIONS: Gilbert 9131, Kahana, West 
Maui, March 22, 1959; 9520, forming a distinct 
zone at high tide level on cement wall of pier 
running out from Natatorium-end of Kuhio 
Beach, Waikiki, Honolulu, Oahu, April 22, 
1959; 9636, in tide pool at Port Allen, Kauai, 
near Salt Pond Beach, April 27, 1959; 9933, 
from tide pool at Honaunau, Hawaii, May 26, 
1959; 9978, from rocks, intertidal zone, 1.5 
miles S of Kailua, Hawaii, May 31, 1959- 
9. Diva fasciata Delile, 1813, p. 153, pi. 58, 
fig. 5. 
This is a common species, previously reported 
from Hawaii by several authors. It is extremely 
variable in form. Only a few of the collections 
studied are listed. 
COLLECTIONS: Gilbert 9218, 9219, Hookipa 
Park, West Maui, March 24, 1959; 9356, Hau- 
ula Park, Oahu, April 4, 1959; 9635, low tide 
level in active surf, near Salt Pond, Port Allen, 
Kauai, April 28, 1959; 9709, on rocks of break- 
water, Nawiliwili Boat Harbor, Kauai, April 
30, 1959; 9921, in 1-3 feet of water, attached 
to rocks, Hookena, Hawaii, May 25, 1959; 
10116, rocks in quiet water, Mapalehu, Molo- 
kai, June 7, 1959. 
10. Diva lactuca Linnaeus, 1753, p- 1163. 
COLLECTIONS: Gilbert 9380, in canal on 
River Street, near Nimitz Highway, Honolulu, 
Oahu, April 7, 1959; 9386, on reef flat at Ala 
Moana Park, Honolulu, Oahu, April 8, 1959; 
9548, on reef at Wailua, Kauai, April 25, 1959; 
10065, attached to iron plates of tug boat, Kau- 
nakakai, Molokai, June 6, 1959. 
11. Diva reticulata f. delicatula f. n. 
Fig. 1 
Frons non affixa, in algis aliis implicata, seg- 
mentis angustis reticulatisque, telis multis par- 
visque, frons ita delicata videtur; frons 32-36 ^ 
crass, cellulae in duobus stratis, 7-13 ^ diam a 
superficie visae, a sectione transversa visae fere 
rotundae, in matrice gelatinosa laxe dispositae. 
Gilbert 9947 , TYPUS, e loco Kahaluu Park 
ad Kailua, Hawaii dicto, m. May 26, 1959 lectus. 
