Marine Benthic Algae from Howland Island and Baker Island, 
Central Pacific 1 
Roy T. Tsuda 2 and Gavino Trono, Jr. 3 
Presented here is an annotated listing of the 
marine benthic algae collected by Mr. C. R. 
Long, under the auspices of the Pacific Ocean 
Biological Survey Program, Division of Birds, 
Smithsonian Institution, from two islands in the 
Central Pacific — Howland Island (0°48'N, 
176°38'W) and Baker Island (0°12'N, 176° 
29'W) . 
A survey of the literature reveals no pub- 
lished papers on the algae from these two 
islands, although Degener and Gillaspy (1955), 
Degener and Degener (1959), and Dawson 
(1959) have reported on the algae of Canton 
Island, in the Phoenix Group, which lies ap- 
proximately 400 miles southeast of Baker Island. 
The collection numbers are those of Mr. 
Long, whom the authors thank for the oppor- 
tunity to work on his collection. All specimens 
are deposited in the herbarium of Dr. Maxwell 
S. Doty, University of Hawaii. 
CYANOPHYTA 
Schizothrix calcicola (Ag.) Gomont, 1892:307; 
Drouet, 1963:275. 
baker island: crl 2395, in seep holes on 
NE end of island, brackish water, Oct. 14, 
1964. The collection appears as gelatinous sheets 
about 5 mm in thickness, with the individual 
filaments about 2p in diameter. 
CHLOROPHYTA 
EJlva fas data Delile, 1813:153; Bprg., 1940:10. 
baker island: crl 2368.1, on rusting ma- 
chinery off SW beach opposite wrecked landing 
craft, Oct. 13, 1964; crl 2369.3, beachdrift on 
1 Contribution No. 295, Hawaii Institute of Marine 
Biology, University of Hawaii, Honolulu, Hawaii 
96822. Manuscript received February 28, 1967. 
2 Department of Biology, College of Guam, Agana, 
Guam 96910. 
3 Department of Botany, University of the Philip- 
pines, Quezon City, Philippines. 
SW beach opposite wrecked landing craft, Oct. 
13, 1964. 
HOWLAND island: crl 2325, in shallow 
pools with sandy bottom at NW point, Oct. 14, 
1964. 
Enteromorpha kylinii Bliding, 1948:1; Bliding, 
1963:103, fig. 61. 
BAKER ISLAND: crl 2367 and CRL 2368.2, 
on rusting machinery off SW beach, Oct. 13, 
1964. The thalli of specimen crl 2367 are 
about 12-15 cm high with proliferations occur- 
ring only at the basal portion. The base is ap- 
proximately 70p wide and increases to 22 5 p at 
the compressed terminal portion. The square to 
rectangular cells, about 9-1 5p in diameter, are 
arranged in longitudinal rows and contain 2-3 
pyrenoids per cell. Specimen crl 2368.2, al- 
though listed here, seems to be more repre- 
sentative of E. tubulosa (Kiitz.) Kiitzing in 
external appearance, but also possesses 2-3 
pyrenoids. 
Cladophora sp. 
BAKER island: crl 2369.4, in beachdrift on 
SW beach opposite wrecked landing craft, Oct. 
13, 1964. The specimen, about 1 cm high, was 
found epiphytic on Hypnea sp. (crl 2369.1). 
The thalli consist of irregular branches of uni- 
form diameter, l40p, with no predominant 
main axis present. 
Dictyosphaeria cavernosa (Forsskal) Bprg., 
1932:2, pi. 1 (fig. 1); Egerod, 1952:350, 
figs. 1 e-g. 
BAKER island: crl 21 68, in beachdrift on 
south reef, July 21, 1964; CRL 2381.4, in drift 
in tidepool on north beach, Oct. 14, 1964; crl 
2382.2, in pools on NE beach exposed at low 
tide, Oct. 14, 1964; crl 2384, in beach pools 
on NE shore, Oct. 14, 1964; crl 2403.1, on 
reef on NE side of island (collected by C. D. 
Hackman), Oct. 15, 1964. 
howland island: crl 2190.3, on exposed 
194 
