CORALS FROM THE CORAL RAG. 101 
and Mr. Morris had entered it in his Catalogue as having been met with in the Inferior 
Oolite of Cheltenham. We have also seen in Mr. Walton’s collection a fossil from the 
Inferior Oolite of Coomb Hay, which does not appear to differ specifically from the 7° 
concinna of the coral rag. Some other specimens of the same species, belonging to M. 
Michelin’s collection, were found in the coralline formation at Stenay, in the Department 
des Ardennes, and those which we have seen in the Museum of Bonn were from Giengen 
and Natheim. 
The British specimens which we have examined were communicated to us by the 
Geological Society, Sir H. De-la-Beche, Mr. Bowerbank, Mr. Walton, Mr. Sharpe, and 
- Mr. Pratt. The one figured in Plate XVIII belongs to the Paris Museum. 
This species is remarkable for the small size of the calices, and by that character alone 
can be easily distinguished from most 'hamnastrea ; most especially from 7. arachnoides,’ 7. 
fungiformis, T. Defranciana,® T. Terquemi,’ and T. mettensis ;° it also differs much by its 
general form from 7. dendroidea,’ 7. afinis,' T. Lyelli,’ T. mammosa,’ T. Waltoni,’ and 
7. cadomensis," which are all much taller and more mamillose. In 7" scifa’’ the septa 
are much more delicate and more numerous. By its general aspect it bears a great resem- 
blance to 7! tenuissima,” but in the latter the septa are thinner and less unequal in size. 
Family FUNGIDA, (p. lxv.) 
Genus Comosrrts.'* 
CoMmosERIS IRRADIANS, Tab. XIX, figs. 1, la, 14, le, ld. 
SIDERASTREA MEANDRINOIDES, M‘Coy, Ann. of Nat. Hist., s. ii, vol. xi, p. 419, 1848. 
Corallum massive, thick, orbicular, or sublobate, and free or fixed by a small portion of 
its basal plate, which is covered with a complete epitheca, presenting circular thick wrinkles 
or accretion folds. ‘The upper surface convex, uneven, and usually divided into a certain 
number of irregular radiating valleys, by elevated ridges, which much resemble those of 
Meandrina, and more especially those of Aspidiscus. Most of the ridges are straight or 
slightly flexuous, and often meet towards the centre of the corallum, but become more 
' Tab. xvii, fig. 1. 2 Tab. xxx, fig. 4. 3 Tab. xxix, figs. 3, 4. 
# Tab. xxx, fig. 2. *" Tabs xxx, fig73. 
6 Astrea dendroidea, Lamouroux, Exp. meth., pl. Ixxvii, fig. 6. 
7 Milne Edw. and J. Haime, Ann. Sc. Nat., 3™°ser., vol. xii, p. 198. 
8 Tab. xxi, fig, 4. 9 Tab. xxiii, fig. 3. 10 Tab. xxix, fig. 4. 
lL Astrea cadomensis, Michelin, Icon., pl. xciv, fig. 4. 
2 Tab. xxii, fig. 4. 
13 Synastrea tenuissima, Milne Edw. and J. Haime, Ann. Se. Nat., 3™ sér., vol. xii, p. 191. 
14 PD'Orbigny, Note sur des Polyp. Fossiles, p. 12, 1849. 
