A Pictorial Atlas of Fossil Remains, consisting of coloured illustrations selected from Parkinson's "Organic remains of a former world," and Artis's "Antediluvian phytology."

by Gideon Algernon Mantell

Plate XXXVIII.

PLATE XXXVIII.

Fossil Corals, and Coral Marbles.

Fig. 1, is a polished slab of the carboniferous limestone, well known as the Kilkenny marble, and much used for chimney-pieces. The figures exposed on the surface are produced by sections of enclosed corals (some species of Cyathophyllum), which are transmuted into white calcareous spar.

Fig. 2. A coral of the same kind (Cyathophyllum turbinatum), from the mountain limestone of Derbyshire.

Fig. 3. A polished slice of Derbyshire marble, the markings on which are derived from sections of enclosed branches of corals (Syringopora), resembling that figured in Pl. XXXIV.

Fig. 4. An elegant compound coral, called "Spider-stone" by collectors (Astrea arachnoides, of Dr. Fleming); from Wiltshire: the geological habitat uncertain; probably the Oolite.