382 
ST. HELENA. 
Liagora, Lamx, 
1048. L. viscida, Forsk. A small buslry, pale Seaweed, occurring 
in the shallow pools on the windward coast, but rare. — Found also at 
the West Indies, Azores, Indian Ocean, Bed Sea, and Eastern 
Australia. 
Pterocladia, Lamx. 
1049. P. lucida, Br. — A red Seaweed, growing parasitically 
and thickly on the backs of limpet-shells which are cast ashore 
somewhat plentifully along the coast ; also found on pieces of wood 
that have been cast up by the sea.— Occurs also on the W. and S.W. 
coasts of Australia, at New Zealand and Ceylon. 
Melobesia, Lamx. 
, 1050. M. farinosa, Lamx.— Found adhering to laurencia cru- 
ciata, at St. Helena, and is very general in both hemispheres. 
Lithothamnion, Phil. 
1051. L. brassica-florida, Harv. var.— A mass of thick, white 
hard, coral-like formation, growing to some extent in the shallow 
pools, and also cast up with the shingle on the beach along the 
southern or windward coast. It is a good deal perforated by a small 
Li/hodomus, the shells of which are found perfect in some of the 
holes.— Found also in Algoa Bay. 
10o2. L. crassum, Phil. — A very similar species, but much 
finer in its branching, and found under similar circumstances. 
Neither species is abundant. — Found also in the Mediterranean. 
Amphiroa, Lamx, 
1053. A. exilis, Harv. ? — A small, fine, delicate and fragile, 
pinkish-white, branching, coral-like Seaweed, found very rarely in 
shallow pools on the windward coast. Also at the Cape of Gfood 
Hope, Brazil, and in the Mediterranean. 
1054. A. fragilissima, Lamx. — Avery fine, delicate, white Sea- 
weed, growing in close tufts somewhat resembling a sponge • very 
rare in the pools at Lot’s Wife Ponds.— Found also at Cuba, 
Eastern India, and in the Mediterranean. 
