CORALS FROM THE GAULT. 67 
and have lost their walls; we are, therefore, unable to characterise the species with 
any degree of precision, and it is with much doubt that we refer it to the genus 
Trochocyathus, for we are not as yet sufficiently satisfied as to the existence of pali. 
M. Michelin is of opinion that these fossils are merely specimens of Zrochocyathus conulus 
with their basis worn away. ‘They are of a conico-conyex form, and are broader in 
proportion than 7. fHarveyanus, to which they bear, however, great resemblance. Their 
height is about four lines, and their diameter a little more. We have not considered 
it necessary to give a new figure of these corals, for the specimens in our possession do not 
show anything more than those represented in Dr. Mantell’s plates. 
The specimens that we have had an opportunity of examining were found in the Gault at 
Folkstone, in the environs of Boulogne-sur-Mer, at Wissant, at Les Fiz, near Chamounix, 
and at the Perte du Rhone, in the department of the Ain. According to Dr. Mantell the 
same species is met with at Lewes im Sussex, and Godstone im Surrey, at Malling in 
Kent, in Cambridgeshire,’ at Ringmer, and at Bletchingley.’ 
TrocHocyATHus (?) WARBURTONT. 
We are inclined to think that a cast found in the Gault of Cambridgeshire by 
Mr. H. Warburton, and presented by that gentleman to the Museum of the Geological 
Society, must belong to a distinct species of Trochocyathus. It is about six lines in 
height, and seven m diameter; the number of septa is forty-eight. For the sake of 
convenience we have given a specific name to it, but we are not able to characterise it. 
4. Genus BatnycYaruus (p. xii.) 
Batuycyatuus SowrrsByi. Tab. XI, fig. 2, 2a. 
Baruycyatuus Sownrsyt, Milne Edwards and J. Jaime, Monogr. des Turbinolides, Ann. 
des Sc. Nat.,.3™° serie, vol. ix, p. 295, 1848. 
Corallum simple, adherent by a broad basis, straight, tall, compressed, and having its 
lateral edges somewhat prominent. /Va// delicately granulated. Coste not very distinct 
in the lower half of the corallum, but becoming rather prominent higher up, especially 
those of the first and second orders. Calice elliptical and horizontal, the relative length 
of its long and short axis varying much (in one specimen = 100: 170, and in another 
= 100:250). Hossw/a narrow, and appearing to be deep, but completely filled up with 
extraneous matter in all the specimens that we have seen, so as not to enable us to obtain 
any knowledge respecting the columella and the pali. It is therefore with some uncertainty 
that we refer this species to the genus Bathycyathus, and in doing so we have been guided 
1 Geol. of Sussex. ? Trans. of the Geol. Soc., s. 2, vol. iii, p. 210. 
