1918] MacCAUGHEY—HAWAIIAN ALGAE 135 
C. Montagnei Waianeana Brand.—This and the preceding occur 
in shallow waters along the coral reefs; the species is Cuban. 
C. antennina (Bory) Kuetz.—This and several other species 
are used locally by the natives for food, chiefly on the islands of 
Maui and Hawaii; they are called limu hulu-ilio, limu ilio, or limu 
manu. 
BRYOPSIDACEAE 
Bryopsis plumosa Kuetz.—Plentiful in quiet shallow waters, on 
sandy bottoms, along the coral reefs; fronds 2-6 in. long, often 
highly pinnatifid. 
CAULERPACEAE 
Caulerpa pinnata (L.) Web.—Collected at Laysan Island. 
C. racemosa var. laetevirens Web.—Collected at Laysan; there 
are several varieties; the species is known from the Red Sea. 
C: laxifolia (Vahl.) Agh.—Plentiful along the leeward coral 
reefs in shallow waters and tidal pools, resembling a miniature 
Lycopodium; occurs throughout the Pacific and Indian oceans. 
CODIACEAE 
Halimeda tuna (Ell. and Sol.) Lam.—Abundant in the shallow 
waters along the coral reefs; a cosmopolitan species, and an impor- 
tant member of the reef-building series of algae. 
H. opuntia (L.) Lam.—Has been collected at various points 
along the reefs and also at Laysan; a cosmopolitan species, with 
‘Many varieties and forms. The reef-building powers of Halimeda 
and its associates have undoubtedly been underestimated in the 
past. : 
Codium adhaerens (Cabr.) Agh.—Thallus crustaceous, forming 
a sheet on the substratum, periphery excrescent; cosmopolitan. 
C. tomentosum (Huds.) Stackh.—This and the preceding are 
called limu aala-ula by the natives; plentiful in shallow reef 
waters; thallus cylindric, elongate, dark green; cosmopolitan. 
C. Muelleri Kuetz.—Known to the natives as limu aala-ula; on 
the island of Hawaii as limu wawae-iole and limu wawae-moa; it 
inhabits shallow coastal waters; often on exposed rocks in the surf, 
or on the outer margins of the reefs. The species of Codium all have 
stout holdfasts, and require a knife or chisel to collect them. 
