1897.] FROM THE S.W. PACIFIC OCEA>'. 943 



2. PocHiLOPOKA STiTFExrTicosA, Yerrill. 



Pocillopora suffndicosa, Yerrill, Bull. Mus. Comp. Zool. Cam- 

 bridge, U.S.A., vol. i. p. 60. 



Pocillopora suffruticosa, Quelch, Challenger Report ou Reef- 

 Corals, p. 65. 



Four low clumps 5-7 cms. high were obtained, which agree 

 well with Verrill's description and the ' Challenger ' specimen 

 referred to this species by Quelch. The calices vary from -5-1 mm. 

 in diameter ; primary septa usually distinct spinulous lamellae in 

 the calices of the terminal branchlets. Columella low but quite 

 distinct and spinulous. Colour of the living colony usually pink. 



Funafuti ; outer reef and 7-20 fathoms. 



The ends of the branches of this species are much galled by a 

 species of Harpalocarcinus. 



3. PociLLOPOBA CESPiTOSA, Dana. 



Pocillopora cespitosa, Dana, Zoophytes, p. 525, pi. 49. fig. 5. 

 A small specimen was obtained which corresponds very closely 

 with Dana's figure and description. 

 Wakaya, Fiji ; outer reef. 



4. Pocillopora septata, n. sp. (Plate LYI. figs. 5, 5 a.) 



I have been obliged to refer a small horizontally growing branch, 

 about 6 cms. long, to a new species. The colony probably forms 

 rather loose hemispherical clumps, arising from an inerusting base 

 with branches dichotomizing very regularly about every 15-20 mms. 

 and about 12 mms. in diameter, 5 cms. belo^v the apices, which 

 are generally very blunt. The upper surface of the type is 

 covered with low rounded verrucse about 2 mms. in height and 

 diameter, formed by 6-8 cells, nearly their own diameter distant 

 from one another. The terminal calices are thin-walled, with- 

 out septa or columella, and show clearly the formation of the 

 tabulae ; the calices of the verrucae are round, about 1 mm. in 

 diameter, but between the verrucse they are seldom more than 

 ■6 mm. The ccenenchyma is everywhere well developed, and is 

 about "4 mm. thick between the calices of the upper surface of 

 the branch, and about 1 mm. between those of the underside ; it 

 is covered everywhere very evenly by low pointed uubrauched 

 spines, which on the cell-walls of the verrucse may form regular 

 striations. The primary and secondary septa are exceedingly well 

 developed, thick and bluntly spinulous in the calices of the 

 verrucse, but in the caHces of the branch are less developed. The 

 calices generally are shallow, being much filled up below by stereo- 

 plasm ; not only the directives, but often the whole of the 

 primaries fuse below with the columella. The latter is small, 

 round, somewhat rough but exceedingly prominent, in the calices 

 between the verrucae often projecting shghtly above their 

 margins. 



Funafuti ; 30 fathoms. 



