390 R. F. Tomes — Inferior Oolite Madreporaria. 



ft. in. 

 Theeoseris polymorpha, Dimorpharaa Beanii, and a species 

 of Microsolena ... ... ... ... ... ... ... 8 



9. Dewbed, forming the bottom of the quarry, and lying on the 



Midford Sands. Depth not ascertained, more than 1 



I now proceed to notice such species of corals from the Inferior 

 Oolite as appear to be either undescribed, new to this country, or 

 as demanding further remark. 



Thecocyathus discus. From, et Fer., Paleont. Franc. Polyp. Terr. 

 Jurass. p. 34, pi. 2, fig. 2. 

 I have received a specimen of this species said to have been 

 obtained from Bradford Abbas, but which, from its colour and litho- 

 logical condition, most likely comes from the same horizon and place 

 as a number of specimens of Discocyathus Eudesi, that is to say, 

 from Burton Bradstock. 



Epismilia porpita, Tomes, 

 Montlivaltia porpita, Tomes, Quart. Journ. Geol. Soc. vol. xxxviii. p. 419, 1882. 



The small Corals I described under the name of Montlivaltia porpita, 

 as having very peculiar septa, have proved, when some of their 

 septa were exposed by the removal of others, to have their sides 

 ornamented by tubercles instead of vertical ridges. These tubercles 

 are ranged in rows, which are parallel to the edge of the septa, and 

 when the latter have been worn down, the upper row on either side 

 comes close to the top, and the septa, which are in reality very thin, 

 are rendered thick and rugged by them. Until fully exposed, they 

 were mistaken for the upper ends of vertical ridges. 



The genus Epismilia is one about which there has always been 

 some doubt, attributable probably to the difficulty attending its deter- 

 mination from Montlivaltia. M. de Fromentel proposed it, and it 

 was clearly recognized as distinct by M. Etallon, under the name of 

 Ellipsosmilia, D'Orb. Thurman, Fromentel and Ferry, knew and 

 made use of the differences between it and Montlivaltia, and so did 

 Stoliczka, while Milaschewitsch not only adopted it, but pointed out 

 a character by which it could more easily be recognized. He showed 

 that the septa have small tubercules on their sides instead of ridges, 

 and Prof. Koby, availing himself of that means of determination, 

 has described ten species as occurring in the Jurassic deposits of 

 Switzerland. 



To the description I formerly gave of the present species, under 

 the name of Montlivaltia porpita, I need only add the above. Though 

 confident of the existence of the genus Epismilia in our Oolites, I 

 could not determine the species when I wrote my former paper. 

 One species may now, however, with certainty be introduced into our 

 Coral fauna. 



Donacosmilia Wrighti, Edw. and Haime sp. 



This common species occurs in the lower or fourth Coral bed 



wherever it is exposed in the Cheltenham district, as well as in the 



third Coral bed at Leckhampton Hill. Crickley Hill has, however, 



supplied all the best specimens, and they show that it is a tall 



