Palceozoic Corals and Foraminifera. 133 



beds of shale and a little sandstone ; C. L. Carboniferous 

 Limestone generally ; C. Sk. Carboniferous Shale generally ; 

 C. SI. Carbonifei'ous Slate, the shales between the base of the 

 lower limestone and the top of the yellow sandstone, alterna- 

 ting more or less with each at the points of junction ; L. L. 

 Lower Limestone, the great limestone of L'cland, between the 

 Calp and the carb. slate ; U. L. Upper Limestone, a thinner 

 deposit than the lower limestone, occurring between the Calp 

 and the millstone grit. Y. S. Yellow Sandstone — a thick 

 sandstone at the base of the carboniferous system in L'eland, 

 occupying the space between the carboniferous slate and the 

 old red sandstone, and by many geologists considered to be- 

 long to the latter ; I have recognised however in the shales in- 

 tercalated with it nearly the same suite of fossils which we find 

 in the carboniferous slate and in the Calp, and in the beds of 

 arenaceous limestone occasionally occurring in it I have iden- 

 tified the most characteristic fossils of the main or lower lime- 

 stone, so that no doubt remains in my mind of the correctness 

 of Mr. Griffith's original view, that this sandstone forms the 

 true base of the carboniferous limestone formation. 



Alveolites. 



Goldfussi (Micliel. sp.), Icon. Zooph. L. L. Hook Head, Wexford. 

 ?paliTiata (M'Coy). Flustra id., Syn. Carb. Foss. Irel. 



Calp. Manor Hamilton. 



ASTREOPORA. 



antiqua (M'Coy), Syn. Carb. Foss. Irel. 



AULOPORA *. 



c campanulata (M'Coy), Syn. Carb. Foss. 

 gigas (M'Coy), Syn. Carb. Foss. of Irel. 

 serpens (Gold.), Petrefacten. 



Berenicea? 



megastoma (M'Coy), Syn. Carb. Foss. 



Caninia. 



cornu-bovls (Mich.), Icon. Zoopb. 

 cornu-copicB (Mich.), Icon. Zooph. 



fiexuosa (Gold, sp.), Petrefacten. 



gigantea (Mich)., Icon. Zooph. -| p' 



^ patula (Mich.), Icon. Zooph. 



* If the small recent and newer fossil corals referred to the genus Alecto 

 really belong (as seems the general opinion now) to the Polyzoa, there 

 could be no hesitation in considering the comparatively gross palaeozoic spe- 

 cies not only as generically distinct, but as belonging to a different order — 

 the sulcation visible within tlie tubesof several of tlie species clearly indicating 

 rudimentary radiating lamellge, whicli, as they exceed twelve in number, 

 place those corals among ihnAiithozoa, — most probably, I think, near Syrin- 

 gopora, in which a similar sulcation has been detected. Instead therefore of 

 considering the words Alecto and Aidopora as synonymous, we may, with 

 advantage, retain each for the peculiar section of the group indicated. 



