lOa BRITISH FOSSIL CORALS. 



Corallum massive, subspheroidal. Calices rather distant, not remarkably prominent, 

 somcAvliat miequal in size, and very open. Columella strong and slightly compressed. 

 Sejota forming three complete cycla, unequally developed, straight and thin. Diameter of 

 the calices one line, or one line and a half. 



The specimen which Mr. M'Coy described, and vrhich we have seen in the Cambridge 

 Museum, was found in the Inferior Oolite at Dundry. M. D'Orbigny has shown us some 

 other fossils which belong to the same species, and were met with in the corresponding 

 strata at Morey, Departement de la Haute Saone. Mr. Terquem has also found it in the 

 Inferior Oolite, near Metz ; but the cast which we have figured here, and which does not ap- 

 pear to differ specifically from the above-mentioned specimens, was found by Mr. Bowerbank 

 in the Great Oolite, near Bath. It is therefore probable that this species exists in 

 both these formations, which are considered as distinct by some authors, but are placed 

 in the same group of strata by our celebrated friend, M. Ehe de Beaumont, under the 

 general denomination of Lower Oolite. 



Stylina sollda resembles S. conifer a^ S. ecliinidata^" S. Deluci,^ and Si. limhata,'' in 

 having six simple equally developed septal systems, and three cycla of the costo-septal 

 radii. It differs from S. limbata by its massive and almost spherical form ; and from 

 8. conifera, by its less prominent calices and small tertiary septa. It bears great 

 resemblance to S. echinidata and S. Deluci; but in the first of these, the columella is 

 perfectly cylindrical, and the primary septa more delicate ; and in the latter the calices 

 are more crowded, and have thinner margins ; the septa are rather thicker, and the 

 columella is larger. 



We consider it necessary to add that, in our figm-e, 3 b, the artist has represented the 

 calices as being much more prominent than they really are, and we regret not having 

 been able to correct that error. 



3. Stylina Ploti, Tab. XXIII, fig. 1. 



AsTiioiTES (?) Robert Plot, Nat. Hist, of Oxfordshire, tab. viii, fig. 2, 1676. 



Corallum massive, convex, and somewhat gibbose. Calices rather closely set, unequal 

 in size, projecting but little, and widely open. Columella small. Septal systems unequally 

 developed ; ten principal septa of equal size, thin, straight, reaching to the columella, and 

 alternating with an equal number of very small ones. Diameter of the large calices, two 

 thirds of a line. 



The specimens of this species wliich we have examined were all much weather-worn, 



1 Tab. xxi, fi"'. 2. * Lamarck, Hist, des .\nim. saus Vert., vol. ii, p. 221. 



» Astrea Deluci, Defrancc, Diet. So. Nat., vol. xlii, p. 386. 



* Astrea limbata, Goldfuss, Petref. Germ., t. i, pi. viii, fig. 7, mid pi. xxxviii, iig. 7. 



