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Paleozoic Corals and Foraminifera. 133 
beds of shale and a little sandstone; C. Z. Carboniferous 
Limestone generally ; C. Sh. Carboniferous Shale generally ; 
C. Si. Carboniferous 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 Ireland, 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. 8. Yellow Sandstone—a thick 
sandstone at the base of the carboniferous system in Ireland, 
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 (Michel. sp.), Icon. Zooph. L. L. Hook Head, Wexford. 
?palmata (M‘Coy). lustra id., Syn. Carb. Foss, Irel. 
Calp.. Manor Hamilton. 
Asrreopora. 
‘antiqua (M‘Coy), Syn. Carb. Foss. Irel.-.C. Sl. Hook Point. 
Au.opora *., 
campanulata (M‘Coy), Syn. Carb. Foss. C. Sl. Hook Head. 
gigas (M‘Coy), Syn: Carb. Foss. of Irel. © Calp. Ballintrillick. 
- serpens (Gold.), Petrefacten. Calp. Bundoran; 
Berenicea? : 
megastoma (M‘Coy), Syn. Carb. Foss. C.Sl. Hook Head. 
CaNINIA. 
cornu-bovis (Mich.), Icon, Zeoph. C. L. Corwen. 
cornu-copie (Mich.), Icon. Zooph. C.Sh. Red Castle, Mt. Rath ; 
Glasgow; I. of Man. 
flexuosa (Gold. sp.), Petrefacten. C. L. Kendal. 
Me iia ; C. L. Easky, Sligo. 
pres + Mich)., Jeon. Zooph. C.Sh. saan ae I. of Man. 
patula (Mich.), Icon, Zooph. C.Sl. Hook, Wexford. 
* If the small recent and newer fossil corals referred to the genus d/ecto 
really belong (as seems the general opinion now) to the Polyzoa, there 
could be no hesitation in considering the comparatively gross palzozoic spe- 
cies not only as generically distinct, but as belonging to a different order— 
the sulcation visible within the tubesof several of the species clearly indicating 
rudimentary radiating lamelle, which, as they exceed twelve in number, 
place those corals among the Anthozoa,—most probably, I think, near Syrin- 
gopora, in which a similar sulcation has been detected. Instead therefore of 
considering the words Alecto and Aulopora as synonymous, we may, with 
advantage, retain each for the peculiar section of the group indicated. 
