30 BRITISH FOSSIL CORALS. 
Family ASTREID Al (p. xxiii). 
Tribe EUSMILIN & (p. xxiii). 
(Lusmiline aggregate). 
1. Genus StYLOC@NIA (p. xxix). 
STYLOc@NIA EMaRcIATA. ‘Tab. V, figs. 1, 1 a. 
ASTROITE DEMI-CYLINDRIQUE, Guettard, Mém. sur les Arts et les Sciences, t. iii, p. 480, 
tab. xxxi, figs. 40, 41, 42, 1770. 
ASTREA EMARCIATA, Lamarck, Hist. des Anim. sans Verteb. t. ii, p- 266, 1816; 2™° edit. 
p- 417. 
— — Lamouroux, Eneyclop. Zooph., p. 127. 1824. 
— _ Defrance, Dict. des Scien. Nat., t. xlii, p. 389, 1826. 
— cyLinprica, Ejusd., loc. cit., p. 379. (From a worn specimen.) 
— styLopora, Goldfuss, Petref. Germ., vol. i, p. 71, tab. xxiv, fig. 4, 1826. (From a 
frustrate specimen.) 
CELLASTREA EMARCIATA, Blainville, Dict. des Sc. Nat., vol. Ix, p. 342, 1830; and Manuel 
d’Actinologie, p. 377. (The fossil figured in the atlas of this 
work, pl. liv, fig. 5, under the name of Cellastrea hystria, 
belongs to this species.) 
ASTREA HMARCIATA, Michelin, Icon. Zooph., p. 154, tab. xliv, fig. 6, 1844. 
—  cYLINDRICA, Ejusd., op. cit., tab. xliv, fig. 4. 
—  becorata, Ejusd., op. cit., p. 161, tab. xliv, fig. 8. 
Stytoc@nia EmMarciata, Milne Edwards and J. Haime, Monogr. des Astreides, Ann. des 
Sciences Naturelles, 3° série, vol. x, p. 293, tab. vii, figs. 2, 2 a, 
1848. 
It is only im the Eocene deposits of the Parisian basin at Grignon and at Parnes that 
this species has as yet been met with in a good state of preservation, but its existence in 
the London clay is sufficiently established by two small fossils found at Bracklesham Bay, 
by Mr. Frederick Edwards, which do not appear to differ from the worn specimens found, 
together with the well-characterised ones in the first-mentioned localities. The following 
description is consequently derived principally from the Parisian specimens; but in order 
to avoid introducing into this Monograph any uncertain elements, we have figured the 
British specimens in preference to more perfect foreign fossils with which we consider them 
as being specifically identical. 
Astrea emarciata is a composite Coral, of an oval, gibbous, or subramose form, which at 
first sight appears to be completely free, but was in all probability primitively fixed on 
some soft, globular, extraneous body, which after having been completely covered by the 
incrusting Coral, disappeared by the progress of putrefaction, and has only left a central 
cavity in the middle of the irregular globose mass thus produced: it consists of a thick 
