1897.] FBOM THE 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. nohilis of Verrill will probably have to be merged in it. 



16. PociLLOPOEA M^ANDEiNA, Dana. 



Pocillopora mceandrina, Dana, Zoophytes, p. 5-33, pi. 50. 

 figs. 6-6 a. 



There are five clumps, the largest 7"5 cms. in diameter by 4 cms. 

 high, which correspond very clo>e!y 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 cceuenchyma is very 

 little developed between the calicos, and the stereoplasm fills up 

 the cells biit little, so that the coralkuu is noticeably light and 

 cellular. Both the septa and columella are very indistinct, 



Funafuti ; outer reef. 



17. PociLLOPOEA COEONATA, 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 

 right 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 wdth small angular calices "S-'S mm. 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, loug, 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 w'ell developed and very thick, 

 with spinulous edges projecting considerably into the cell. The 

 columella is small but very prominent, round and knobbed. The 

 coenenchyma is very dense and compact, but nowhere very 

 abundant between the corallites, which are almost completely 

 filled up below by stereoplasm. The base of the corallum is of a 

 dark brown-red colour ; the living colouj^ is green. 



Eotuma ; 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 



