"FROM THE ZONE OF AMMONITES ANGULATUS. 



39 



Montlivaltia Haimei, Ch. et Dew., is found there, and the form has a greater resem- 

 Tjlance to the Belgian type than to the specimens from Marton. The multiseptate and 

 granular varieties of the species are also found. 



Montlivaltia papillata, Duncan, is noticed amongst the Irish coral-fauna, and 

 Septastrcea Fromenteli, Terquem et Piette, also. 



The Coral-fauna of the Zone of Ammonites anqulatus of Lincolnshire is clearly strongly 

 represented in the North of Ireland, and the MoUusca which accompany the Corals of the 

 tirst locality are noticed to be associated with those of the last. 



There is a Montlivaltia of the Montlivaltia papillata type which is special to the 

 Irish Lias. Oppelismilia gemmans is not foimd in any other locality than Waterloo, 

 Lame. 



Genus — Oppelismilia. 



The corallum is simple, attached, and conical. The epitheca is well marked, and 

 reaches to the calicular margin. 



The calice is shallow, and the septa are numerous and close. There are no costse, 

 and there is no columella. Gemmation occurs within the calice, and the bud, which has 

 an epitheca, grows with the parent. 



The genus thus includes Montlivaltise with calicular gemmation. 



Oppelismilia gemmans (sp. nov.). PI. X, figs. 33, 34. 



The corallum is short ; it has a broad and flat calice, an oval space at the base 

 where it was once adherent ; a strong epitheca, with circular markings, and there are 

 no costae. 



The calice is flat and shallow, and its margin is sharp. 

 The septa are very numerous and unequal. 



The bud on the calice has an epitheca, and its septa are faintly dentate. 

 Height of the corallum, ^hs inch. Width of the calice, f'gths inch. 

 Locality, Waterloo, Lame, North of Ireland. In the Collection of Ralph Tate, 

 Esq., F.G.S. 



The following new Montlivaltia is also from the Lias of Ireland 



Montlivaltia Hibernica (sp. nov.). PI. X, flgs. 22, 23. 



The corallum is discoidal, the base is flat, and the calice is convex. 

 The epitheca of the base is strongly marked concentrically. 



The septa are numerous, close, unequal,, and are marked by small papilla% 

 which are very close together, and by flat eminences, which are also very close 

 together. There appear to be nearly five cycles of septa, and the largest se[)ta are papillose. 



