CORALS FROM THE DEVONIAN FORMATION. 227 



The fossils described by Mr. Lonsdale luider the name of Turbinolopsis hina)- appear to 

 belong also to the genus Cyathophyllum, but have as yet been found only in the form of 

 casts which are scarcely determinable. They show in general 72 septa of unequal size, 

 alternately denticulated, and slightly curved towards the centre of the visceral chamber. 

 Prof. Phillips mentions the existence of this coral in the Devonian deposits of Combe, near 

 Ashburton.^ 



The corals to which the names of Turhinolo^ms pauciradialisf T. elongata^ T. rugosa^ 

 and T. pluriradialis^ have been given by Prof. Phillips, appear to be specifically identical, 

 or very nearly allied to the preceding species ; but the specimens as yet known are so 

 imperfect that we cannot lay before the reader any useful information concerning their 

 structure. 



8. Cyathophyllum helianthoides. Tab. LI, figs. 1, \a. 



Cyathophyllum helianthoides, Goldfuss, Petref. Germ., vol. i, p. 61, tab. xx, fig. 2a — ^' 



and tab. xxi, fig. 1, 1826. 

 Favastkea helianthoidea. Be Blainville, Diet. So. Nat., vol. Ix, p. 341, 1830. — Man., p. 375. 

 TuRBiNOLiA helianthoides, and Astrea helianthoidea, Steininger, Mem. Soc. Geol. de 

 France, vol. i, pp. 344, 345, 1831. 



MONTICULARIA AKEOLATA, Ibid., p. 346, pi. XX, fig. 10. 



Cyathophyllum helianthoides, Morren, Descr. Corall. Belg., p. 58, 1832. 



— — Milne Edwards, 2d edit, of Lamarck, vol. ii, p. 429, 1836. 



compressed specimens, its small end obtuse from the filling up of a considerable length of the base of the 

 coral, by nearly solid sclerenchyme ; external walls thick, dense ; lamellae averaging 74 in the adult cups ; 

 with the diameter of two and a half inches, the primary ones extending towards the centre, nearly straight 

 for above one third the diameter, then abruptly diminishing in strength, and gradually convoluted spirally 

 towards the broad central area ; the secondary lamellae much finer than the primary, extending about one 

 fifth of the diameter towards the centre ; internal casts with thirty-three to thirty-seven broad, flattened, 

 smooth ribs, separated by deep smooth-edged sulci (representing the primary lamellae) ; these sulci in some 

 specimens, divided by connecting filaments of matrix, produced by perforation in the original plate ; each 

 rib divided in the middle by a very fine slit, not reaching quite to the narrow base, (representing the 

 secondary lamellae,) becoming nearly as strong as the primary towards the broad edge of the cup. No 

 transverse vesicular laminae. Lengths of imperfect casts about two and a half inches ; width of same 

 specimen pressed flat, nearly four and a half inches ; width of ribs between the primary sulci at edge of cup 

 varying from two to three lines. Very common in the fine grey Devonian slates of New Quay." (M'Coy, I. c.) 



1 Turbinolopsis bina, Lonsdale, in Murchison, Silur. Syst., p. 692, pi. xvibis, fig. 5, 1839. Turbinolopsis 

 binal Ibid., p. 693, pi. xvi bis, fig. 6. Petraia hina, M'Coy, Syn. Sil. Foss. of Ireland, p. 60, 1846. 

 Streptelasmce bina, D'Orbigny, Prod, de Pal., vol. i, p. 47, 1850. Cyathophyllum binum, Milne Edwards 

 and Jules Haime, Pol. Foss. des Terr. Palaeoz., p. 374, 1851. 



2 Palffioz. Foss., p. 4, pi. i, fig. 2. 



3 Phillips, Palaeoz. Foss., p. 5, pi. i, fig. 4. From Corffle Quarr}% near Tawstock. 

 * Ibid., p. 6, pi. ii, fig. 68. From Horderley, May Hill, and Lickcy Hill. 



5 Ibid., p. 7, pi. ii, fig. 7c. From Snowdon. 



6 Ibid., pp. 5, 0, pi. ii, figs. 5a, 5/3. From Brushford, Linton, Pilton, and Fowey Harbour. 



30 



