CORALS OF THE LONDON CLAY. 



Order 1.— ZOANTHARIA. 

 Family TURBINOLID^ (p. xi). 

 Tribe TURBINOLIN^E (p. xvi). 



1. Genus Turbinolia (p. xvi). 

 1. Turbinolia sulcata. Tab. Ill, figs. 3, 3 a, 3 b, 3 c. 



Turbinolite de deuxieme grandeur, Cuvier and Alex. Brongniart, Geogr. Mineral, des 



Environs de Paris, pi. ii, fig. 3, 1808. 

 Turbilonia sulcata, Lamarck, Hist, des An. sans Vert., t. ii, p. 231, 1816 ; 2d edit., p. 361. 



— — Lamouroux, Expos, meth. des Genres de Polypiers, p. 51, tab. Ixxiv, 



figs. 18-21, 1821. (V ei 7 bad figures.) 



— — Cuvier and Brongniart, Descript. Geol. des Environs de Paris, p. 33, 



tab. viii, fig. 3, 1822. 



— — Beslongchamps, Encyclop. method. Zoopb., p. 761, 1824. 



— — Goldfuss, Petref. Germ., vol. i, p. 51, tab. xv, fig. 3, 1826. (This 



figure is very good, excepting that the columella is not conical 

 enough.) 



— — Fleming, Hist, of British Animals, p. 510, 1828. 



— — Def ranee, Diet, des Scien. Nat., vol. lvi, p. 93, 1828. (The Coral 



figured under this name in the Atlas of the Dictionnaire des Sci- 

 ences Naturelles, tab. xxxvi, fig. 2, and in the Manuel d' Actinologie, 

 by M. de Blainville, is not a Turbinolia, and appears to belong to 

 the genus Trochocyathus.) 



— — Holl, Handb. der Petref., p. 415, 1829. 



— — Bronn, Lethaea Geognostica, vol. ii, p. 899, tab. xxxvi, fig. 4, 1838. 



(This figure is good, but the columella is rather too thick.) 



— — Nyst, Descript. des Coquilles et Polypiers fossiles de la Belgique, 



tab. xlviii, fig. 11, 1843. (This figure is copied from Goldfuss; 

 the description is referable to the Turbinolia Nystiana.) 



— — Michelin, Iconogr. Zooph., p. 151, pi. xliii, fig. 4, 1844. 



— — Graves, Topogr. Geogn. de l'Oise, p. 701, 1847. 



— — Milne Edwards and Jules Haime, Annales des Scien. Nat., 3 me serie, 



vol. ix, p. 236, 1848. 



This corallum lias the form of a cylindroid, elongated cone, and is not contracted just 

 above its basis, nor inflated near the calice (figs. 3, 3 5); sometimes only the cone is 

 somewhat shorter in proportion to its length (fig. 3 a). The costa are very thin, sharp, 

 straight, and very prominent from top to bottom, but particularly so near the basis of the 

 corallum. The secondary costae are nearly as long as the primary ones ; they do not, 

 however, originate quite at the same level. The tertiary costae begin to appear about half 

 way up the wall in young specimens, and occupy two thirds of the height of the Coral in 



