A history of the British sea-anemones and corals . reason to think, however,that they are not fossil; and the same is my own impres-sion, though I can scarcely assign any definite grounds forit, except the fresh appearance of one or two of the speci-mens. Some of them are rubbed, and one is polishedexternally. The uniformity in size of the individuals, and the fulldevelopment of the plates, indicate a probability that,minute as they are, they have attained adult age. [mixtus (foss.).] [crispus (foss.).] Wrightii. [Ceratotrochus (foss.).] 329 GENUS IV. ULOCYATHUS (Saes). Flabellum (Gray). Coral
A history of the British sea-anemones and corals . reason to think, however,that they are not fossil; and the same is my own impres-sion, though I can scarcely assign any definite grounds forit, except the fresh appearance of one or two of the speci-mens. Some of them are rubbed, and one is polishedexternally. The uniformity in size of the individuals, and the fulldevelopment of the plates, indicate a probability that,minute as they are, they have attained adult age. [mixtus (foss.).] [crispus (foss.).] Wrightii. [Ceratotrochus (foss.).] 329 GENUS IV. ULOCYATHUS (Saes). Flabellum (Gray). Coralhim simple, free, turbinate, with traces ofadherence (in the young state) on a very short wedge-shaped crooked pointed base. Columella and palules entirely wanting. Ribs not at all prominent, sometimes obscure. Plates very thin, high, very salient above the marginof the cup, distinct throughout their length. Calice very deep; the margin sinuous and crisped. Animal resembling that of Caryophyllia. Only one species has been recognised, U. arcticui. ULOCYATHUS ARCTICUS (after Sars) slightly magnified. CA R YOPHYLLIA CEA. TURBINOLIA DsE. THE SCARLET CRISP-CORAL. Ulocyathus arcticus. Specific diameter. Base triangular and flat, bounded by a sharp edge :calice round. f/ocyathus arcticus. Saes, Fauna Litt. Norv. ii. 73 ; pi. x. figs. 18— MacAndrewi. J. E. Gray, Proc. Zool. Soc. May, 1849 : pi. ii. figs. 10, 11. GENERAL Corallum. Simple, free, but with traces of having been adherent ininfancy : the base with a great inferior surface, triangular, flat, oftenconcave, separated from the superior surface, which is equally triangularand convex, by a sharp edge on each side. Ribs. Large, often indistinct, unequal; the primaries sometimes armedwith minute tubercles. Calice. Very wide and deep; the edge almost circidar, crisped withminute sinuosities. Plates. These are so irregular that it is difficult to count the cycles,but they are at least four. Those o
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