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Show 124 MR. C. W. ANDREWS AND OTHERS ON THE [Feb. 20, POCILLOPORA (?) FAVOSA. Pocillopora (?) favosa Ehrenberg, Corallenthiere, p. 127. Two small tufts of short, stout, compressed lobes, thickly covered with small conical, or rather pointed processes; no septa visible except as striae in the very young calicles. These two specimens are placed under this specific heading with some hesitation. In M.-Edwards's description of P. favosa a distinct columella is mentioned, but no septa. Mr. Stanley Gardiner ' describes septa-" the primaries being specially thick and bluntly spined ;" and Dr. Klunzinger2, who photographed the original type, says that there is little columella, and the septa are hardly at all developed. In these last points the two specimens from Christmas Island agree with Ehrenberg's type, but hardly with its more freely branching growth. Occurs in pools and channels on the reef-flat, Flying Fish Cove. Genus GONIASTRCEA M.-E. & H. GONIASTRYEA RETIFORMIS. GoniastraM retiformis (Lamarck) M.-E. & H. Les Coralliaires, ii. p. 446. Two fragments of a convex small-calicled species of Goniastrcea which may be provisionally placed with this species. The size of the calicles (3 mm.) agrees, but their depth is greater, at least on the summit of the stock, where it may reach 5 mm.; elsewhere it is 3 mm., as given by Milne-Edwards & Haime. N o locality is given for Lamarck's type. There is further a spirit-specimen in a good state of preservation, which shows the living colony to have been of a bright green colour. The dried skeletons with attached organic matter are reddish brown. Found in pools and channels on the reef-flat, Flying Fish Cove. GONlASTRiEA AURICULARIS, Sp. 11. Description. Colony forms ear-shaped, semicircular plates which project horizontally from the sides of rocks. Its upper surface is slightly concave, the edge thin and sharp, supported by continuous epitheca which covers the whole under surface. The thicker parts are about 1*5 cm. The calicles, owing to the method of multiplication, vary greatly in size, the maximum being about 3-5 m m . The top of the thin wall is a fine zigzag; some 16-18 visible septa rise to the top of the wall and may even make the edge slightly denticulate; between these, faint traces of another cycle can be seen with a pocket-lens. The swollen inner edges of the primaries (at times of a few secondaries also) rise as thick, flattened, round-topped pali to within about 1 m m . of the top of the wall. 1 Proc. Zool. Soc. 1897, p. 941. 2 Corallenthiere, iii. 1879, p. 68, pi. vii. fig. 2. |