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The most frequent coral in the hollows on the reef is Pocillopora verrucosa, which grows in short sinuous plates, or branches, and when alive is of a beautiful pale lake-red: a Madrepora, closely allied or identical with M. pocillifera, is also common.
On the beach within the reef, the rolled fragments consisted chiefly of the corals just mentioned, and of a massive Porites, like that at Keeling atoll, of a Meandrina, Pocillopora verrucosa, and of numerous fragments of Nullipora.
It is very unusual to meet with an animal belonging to the family of Lepades in tubular holes made in the coral rocks, as is the case with the Lithonaetta N. Among the twenty kinds of tabular coral here observed, there was not one of those collected at O Tahaiti; there were three new Distichoporæ, Seriatipora, six kinds of Madrepora, two Porites, four Astrea, Pocillopora cærulea, and another kind, forming broad, yellow, leafy masses, the slime of which stings like a nettle; Cariophyllæa glabrescens Cham., and Tubipora, with red animalculæ.
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