PACIFIC OCEAN. 
213 
coverer) about coral-reefs, I have left it uncoloured.— 
Tongatabou : in the atlas of the Voyage of the Astrolabe, 
the whole south side of the island is represented as 
narrowly fringed by the same reef which forms an exten- 
sive platform on the northern side. The origin of this 
latter reef, which might have been mistaken for a barrier- 
reef, has already been attempted to be explained, when 
giving the proofs of the recent elevation of this island. — In 
Cook’s charts the little outlying island of Eoaigee is repre- 
sented as fringed ; coloured red. — Eoua : I cannot make 
out from Captain Cook’s charts and descriptions that this 
island has any reef, although the bottom of the neighbour- 
ing sea seems to be covered with corals, and the island 
itself is formed of coral-rock. Forster, how r ever, distinctly 
(Observations, p. 14) classes it with the high islands 
having reefs, but it certainly is not encircled by a barrier- 
reef; and the younger Forster (Voyage, vol. i. p. 426) says, 
that ‘ a bed of coral rocks surrounded the coast towards the 
landing-place.’ I have therefore classed it with the fringed 
islands, and coloured it red. Dana also shows (Corals and 
Coral Islands, p. 337) that most of the islands of this group 
are formed of upraised coral-rock. The several islands 
lying N.W. of Tongatabou, namely Anamouka, Eomango, 
Eotou, Lefouga, Foa, &c., are seen in Captain Cook’s chart 
to be fringed by reefs, and several of them are connected 
together. From the various statements in the first volume 
of Cook’s Third Voyage, and especially in Chapters IV. and 
VI., it appears that these reefs are of coral, and certainly 
do not belong to the barrier class ; coloured red. — Toufoa 
and Kao, forming the western part of the group, according 
to Forster, have no reefs ; the former is an active volcano. 
— Vavao : there is a chart of this singularly-formed island, 
by Espinoza : according to Mr. Williams it consists of 
coral-rock : the Chevalier Dillon informs me that it is not 
fringed ; not coloured. Nor are the islands of Latte and 
