1898.] CORALS OF THE SOUTH PACIFIC. 263 



2. TuEBiNAEiA SCHISTICA, n. sp. (Plate XXIV. fig. 9.) 



Ooralluin very closely approaching that of T. orbicularis, but 

 altogether much thicker and more massive. Edge of the corallum 

 generally about 3 mm. thick, uot wrinkled on the under surface. 

 Calices usually 2-3 mm. in diameter, with margins slightly pro- 

 tuberant as tiiin rings about 1 mm. high. There are in most 

 calices 24 thin septa with rather rough edges, projecting but little 

 into the calice ; their upper edges project at a very acute angle to 

 the edge of the calices and their inner edges are almost vertical. 

 The columella is very conspicuous, round and rather protuberant, 

 situated about 1-5 mm. below the upper opening of the calice and 

 formed by a rather coarse flaky reticulum. The coeuenchyma is 

 composed of a fine reticulum, moderately spiny on the surface, 

 and formed of somewhat thin and flattened elements, which give 

 it a distinctly flaky appearance. 



Wakaya, Fiji ; lagoon, 1-2 fathoms. 



There are two fragments of this species, the edges of a cup. 

 The greater part of the under surface of the corallum of both has 

 been killed, giving somewhat the appearance of an epitheca, but 

 the sections show very clearly the extent to which it has gone on ; 

 the corallum of one piece, 3-5 cm. from the edge of the cup, is 2 cm. 

 in thickness, but of this the lower half is quite dead. 



The species very closely approaches to T. orhicularis, but it is at 

 once separable by the characters of the coenenchyma. 



3. 



TuBBiNAEiA PULCHEEEiMA Bernard (30). 



One small specimen, weighing 45 grams, a growth of less than 

 22 months, was obtained off the chain of a buoy. Owing probably 

 to its position, its growth is rather more irregular than the type. 



Levuka, Eiji ; harbour, 2 fathoms. 



4. TuEBiNAEiA MBSENTEEiNA Bernard (37). 



I have referred six pieces from the same colony to this species, 

 with which they closely correspond in their coenenchyma and in 

 the parts within the calices. 



Eotuma ; pool in outer reef. 



From my specimen, it seems as if this species should rather be 

 placed among the foliate types. The type specimen in the British 

 Museum grew probably in a hole near the extreme outer edge of 

 the reef, where its upper edges would be just awash at low tides, 

 and consequently would be unable to grow further upwards ; 

 everywhere between its folia also are the tubes of worms and 

 molluscs. 



III. G-enus Aste^opoea. 



Astroeopora BlainviUe, Diet, des Sci. Nat. t. ix. p. 348 (1830), 

 There are eight specimens of this genus, which I have referred 

 to four species. The genus, although represented by so few species, 

 is a fairly abundant one in the lagoon of Funafuti and the boat- 



