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Show 1897.] FROM T H E s.w. PACIFIC OCEAN. 949 directive is often larger and prolonged to join the small, but distinct, columella. Funafuti; outer reef and 20 fathoms. This species seems to me to be distinct from P. verrucosa, but P. nobllis of Verrill will probably have to be merged in it. 16. POCILLOPORA MJEANDRINA, Dana. Pocillopora mceandrlna, Dana, Zoophytes, p. 533, pl. 50. figs. 6-6 ff. There are five clumps, the largest 7*5 cms. in diameter by 4 cms. high, which correspond very closely to Dana's description. The branches are much compressed, and have very sinuous summits seldom more than 7 mms. broad, sometimes nearly naked, but generally covered by small verrucae. The ccenenchyma is very little developed between the calices, and the stereoplasm fills up the cells but little, so that the corallum is noticeably light and cellular. Both the septa and columella are very indistinct. Funafuti; outer reef. 17. BOCILLOPORA CORONATA, n. sp. (Plate LVI. figs 4, 4 a.) Corallum consisting of much flattened branches, which may anastomose with one another. The verrucae over the tops of the branches are very small, but on the sides are somewhat obtuse, 2-3 mms. broad at the base by 1-3 mms. high, and arise almost at ri^ht angles to the stem ; they are separated from one another by a distance of 1-3 mms. The summits of the branches are slightly flattened but not thickened, and are covered over and between the low verrucae with small angular calices *5-*8 m m . in diameter, with neither septa nor columella. The calices on the verrucae and sides of the branches are usually round, and from '8-1*2 mms. in diameter, with a ring of very thick, long, blunt, branched and knobbed spinules round their margins; these spinules between neighbouring calices are very large, much flattened, placed in rows, and to some extent continuous with the septa within. The primary and secondary septa are well developed and very thick, with spinulous edges projecting considerably into the cell. The columella is small but very prominent, round and knobbed. The ccenenchyma is very dense and compact, but nowhere very abundant between the corallites, which are almost completely filled up below by stereoplasm. The base of tbe corallum is of a dark brown-red colour ; the living colony is green. Botuma; 3 fathoms. The specimen is a much-flattened branch 9*5 cms. long, obtained by diving. At its base it is 21 mms. broad by 10 mms. thick. It divides dichotomously, 3 cms. above, into two flat branches, which, however, 1 cm. above have fused with one another for a distance of 2 cms. At its apex the one branch is 3-5 cms. broad by 5 mms. thick, and the other 1*4 cms. broad by 6 mms. thick. The cells on the sides of the branches and on the |
