BRITISH FOSSIL CORALS. 
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The genus Leptocyathus, which we have established for this fossil, is nearly allied to 
Trochocyathus, but differs from it by its subdiscoidal form, the absence of all sign of 
adhesion at the basis, and the existence of pali corresponding to all the septa. The genus 
Kemesus of Philippi’ appears to present most of the same characters, but, as far as we can 
judge by the very short description, and by the rough figure given by that author, the 
calice appears to be eccentric, a mode of structure which is quite exceptional, and 
very remarkable. 
The fossil Coral from the environs of Biaritz, mentioned by Viscount d’Archiac® 
under the name of Turbinolia atalayensis, belongs probably to the same generical division 
as our Leptocyathus elegans, but differs from it by its large size, by the existence of a fifth 
cyclum of septa, and by the smooth surface of the central portion of its wall. 
Leptocyathus elegans was found in the London Clay, at Haverstock Hill, by Mr. 
Frederick Edwards, who obligingly communicated to us the only specimen that has as yet 
been seen. 
2. Genus Trocnocyatuus (p. xiv). 
TROCHOCYATHUS SINUOSUS. 
TURBINOLIA TURBINATA (pars), Lamarck, Hist. des An. sans Vert., t. ii, p. 231, 1816. 
— .... Parkinson, Organic Remains, vol. ii, tab. iv, fig. 11, 1820. 
_ stnuosa, Alex. Brongniart, Mém. sur les Terr. du Vicentin, p. 83, pl. vi, 
fig. 17, 1823. 
_— o Bronn, Syst. des Urweltlichen Pflanz., tab. v, fig. 12, 1825. (Bad 
figure.) 
— puBIA, Defrance, Dict. des Se. Nat., vol. lvi, p. 92, 1828. 
= SINUOSA, Bronn, Lethea Geognostica, vol. ii, p. 897, 1838. 
— — Leymerie, Mém. de la Soc. Géol. de France, 2™° serie, pl. xiii, 
figs. 7, 8, 1845. 
— — Michelin, Yeon. Zooph., p. 270, pl. lxiii, fig. 1, 1846. 
TROCHOCYATHUS SINUOSUS, Milne Edwards and J. Haime, Ann. des Sc. Nat., 3™° série, 
vol. ix, p. 314, 1848. 
We have not met with this fossil in any collection of the British Corals, but Parkinson 
has figured it in a very recognisable way, and mentions it as having been found in the 
Isle of Sheppy; we must therefore recall its specific characters in this monograph, 
although we deem it advisable not to have it figured from a foreign specimen. 
Corallum subturbinate, rather compressed, and having its inferior extremity slightly 
curved in the direction of the small axis of the calice. Coste distinct from the basis, very 
narrow, numerous, closely set, simple, unequal, delicately granulated, and projecting very 
little. Cadice oval, and contracted in the middle, so as to assume the form of an 8. 
1 Neues Jahrb. fiir Mineral. Geol., vol. ix, p. 665, tab. xi, fig. B 1, 1841. 
? Bulletin de la Soc. Géol. de France, 2™ série, vol. ii, p. 1010, 1847. 
