CORALS FROM THE INFERIOR OOLITE. 133 
strong, presenting concentric folds or wrinkles, and ceasing at a considerable distance from 
the calicular margin. Calice somewhat convex, with a small shallow central fossula. 
Columella rudimentary, and formed by a certain number of denticules arising from the 
inner edge of the septa. Five cycla of septa; but the last cyclum not developed on one 
side of some of the systems. The S¢p¢a straight, closely set, exsert, terminated by a well- 
denticulated edge, and slightly striate on their lateral surfaces, but very feebly granulated ; 
the primary ones rather thick, especially towards the middle; the secondary ones almost 
as large as those of the first cyclum ; the others unequally developed according to the orders 
to which they belong. ; 
The largest specimens which we have seen were almost one inch in diameter, and about 
four lines high. 
This fossil is found in the Inferior Oolite in France, as well as in England. Specimens 
from Castle Cary, Somersetshire, exist in the collections of the Museum of Practical 
Geology and of the Paris Museum; specimens found at Dundry have been communicated 
to us by Mr. Bowerbank and Mr. Pratt ; others, in Mr. Walton’s collection, were found at 
Silcombe, Hawkesbury, and Camdown, in Somersetshire, at West Swillets in Dorsetshire, 
and at Sudbury in Gloucestershire. M. Terquem, of Metz, has met with the same species 
in the environs of that city. 
Moutlivaltia Delabechii has a very peculiar form, and may be considered as intermediate 
between the species which are cylindrical with a convex basis, such as IZ, Waterhouse and 
M. regularis * and those which are quite discoidal, as JZ. depressa’ and M. lens." In these 
last two the wall is entirely horizontal, as in a Cyclolite; and the epitheca does not extend 
over any part of the exterior edge of the septa; whereas in J/, Delabechii the epitheca 
ascends from the basis some way up the sides of the corallum ; in that respect it resembles 
the inferior portion of a Montlivaltia Waterhousei or a M. regularis, and it might be 
considered as a variety of one of those specimens, were it not for its septa being more 
numerous and straight. It also resembles very much JZ. cyclolitocdes,° but is taller, and is 
also characterised by the strong strize which exist on the lateral surfaces of the septa. 7. 
decipiens,’ to which Prof. M‘Coy refers this fossil, differs from it by its form, which is much 
more conical, by its being broadly adherent, and not showing any vestiges of a columella. 
7. Montiivattia Lens. Tab. XXVI, figs. 7, 7a, 76, 7c; fig. 8. 
Corallum discoidal, very short, and much resembling a Cyclolite by its form. Wall 
quite horizontal, or somewhat concave towards the centre of the basis, and covered with a 
1 Tab, xxvii, fig. 7. 2 D'Orbigny, Prod. de Paleont., vol. i, p. 346. 
3 Tab. xxix, fig. 5. 4 Tab. xxvi, fig. 7. 
5 Thecophyllia cyclolitoides, Milne Edwards and J. Haime, Ann. des Se. Nat., s. 3, vol. xi, p. 242. 
5 Anthophyllum decipiens, Goldfuss, Petref. Germ., vol. i, tab. Ixv, fig. 3. 
