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Show • 1897.] FROM THE S.W. PACIFIC OCEAN. 943 2. BOCILLOPORA SUFFRUTICOSA, Verrill. Pocillopora sufrutlcosa, Verrill, Bull. Mus. Comp. Zool. Cambridge, U.S.A., vol. i. p. 60. Pocillopora suffruticosa, Quelch, Challenger Eeport on Beef- 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-l m m . in diameter; primary septa usually distinct spiniilous 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 Harpalocarclnus. 3. BOCILLOPORA CESPITOSA, Dana. Pocillopora cespitosa, Dana, Zoophytes, p. 525, pl. 49. fig. 5. A small specimen was obtained which corresponds very closely with Dana's figure and description. Wakaya, Fiji; outer reef. 4. BOCILLOPORA SEPTATA, n. sp. (Plate LVI. figs. 5, 5a.) 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 incrusting base with branches dichotomizing very regularly about every 15-20 m m s. and about 12 mms. in diameter, 5 cms. below the apices, which are generally very blunt. The upper surface of the type is covered with low rounded verrucae about 2 m m s . in height and diameter, formed by 6-8 cells, nearly their own diameter distant from one another. The terminal calices are thin-walled, without septa or columella, and show clearly the formation of the tabulae; the calices of the verrucae are round, about 1 m m . in diameter, but between the verrucae they are seldom more than *6 m m . The ccenencbyma is everywhere well developed, and is about *4 m m . thick between the calices of the upper surface of the branch, and about 1 m m . between those of the underside ; it is covered everywhere very evenly by low pointed unbranched spines, which on the cell-walls of the verrucae may form regular striations. The primary and secondary septa are exceedingly well developed, thick and bluntly spinulous in the calices of the verrucae, but in the calices 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 slightly above their margins. Funafuti; 30 fathoms. |