Catalogue of lithophytes or stony corals in the collection of the British Museum . moved, appears to be attached to the pedunclesof the cells. These peduncles are in closely set whorls of three orfour, each of which expands into a cup-like cell, having its mouthclosed in the dead coral with eight scales that have their apices incontact. The peduncles project at right angles from the stem, andare also clothed with scales. This is a much more delicate form than Primnoa lepadifera, inwhich species the pedunculated cells appear to be arranged spirallyon the branch. Two sjjecimens of this elegant P
Catalogue of lithophytes or stony corals in the collection of the British Museum . moved, appears to be attached to the pedunclesof the cells. These peduncles are in closely set whorls of three orfour, each of which expands into a cup-like cell, having its mouthclosed in the dead coral with eight scales that have their apices incontact. The peduncles project at right angles from the stem, andare also clothed with scales. This is a much more delicate form than Primnoa lepadifera, inwhich species the pedunculated cells appear to be arranged spirallyon the branch. Two sjjecimens of this elegant Primnoa have been obtained, thelarger of which has a height of 8| inches, with a width of 11 was attached to a piece of Lophohelia {Oculina) prolifera. Thewhorls of the pedunculated cells are about three-twentieths of an inchapart, and the peduncles about the same in height. The principal / /. PRIMNOELLA. 49 branch, near the base, has a diameter of one-fifth of an inch. Thesmaller example has been deposited in the British Musenm.—Johnson, I. c. Hah, Madeira. Fi^. Stenella Cells close side hy side, forming rings roimd the stem and branches. 76. NARELLA. Coral fan-like; branches cylindrical, dichotomons. Bark thin,white, fugacious, composed of small, thin, angular, plate-like papilionaceous, whorled; whorls forming cylindrical rings roundthe stem. 154. Narella regularis. Primnoa regularis, Duchass. S^- Michel. Corall. Antilles, p. 17, f. 12,13; Kolliker, Ic. Hist. p. , t. 17. f. 13. Hctb. Guadaloupe. 77. PRIMNOELLA. Coral simple, elongate, cj-lindrical. Axis continued, stony. Barkgranular, smooth. Polypiferous cells numerous, close-pressed, sub-cylindrical, regular, small, placed in close regular circles, each con-taining many cells round the stem ; each cell covered with two seriesof small imbricate scales. Priumoella, Gray, P. Z. S. 1857, p. 285; 1859, p. 483. E 50 PKIMNOADiE. 155. Primnoella Australasias. Coral elongate,
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