400 Mr. Weaver on the Structure of the South of Ireland^ 
CoNCHiFERA {continued). Localities in carboniferous Ibneslone. 
Leptaena (Producta) depressa (Stropho- 
mena marsupita, Defr.), Sow Richelle, Fermanagh. 
L. Scotica, 6’oz/; Richelle, Chokier, Castlemaine. 
L. hemisphaerica. Sow Richelle, Chokier, Ratingen, 
Buttevant. 
L. longispina. Sow Richelle, Linlithgow. 
L. sarcinulata, Soiu Richelle, Vise. 
L. scabricula. Sow. Vise, Liege, Dublin. 
L. rugosa (Strophomena, Rajin.), 
Dalm Chokier. 
Pterinea elegans, Goldf. Ratingen. 
Cardium elongatum. Sow Ratingen, Derbyshire. 
C. alaeforme. Sow Ratingen, Queen’s County. 
Sanguinolaria concentrica, Phillips , . . . Tour Mountain, County Cork. 
Ckinoidea. 
Actinocrinites 30-dactylus, Mill Mendip, Yorkshire. 
A. l^vis, Mill Ratingen. 
Rhodocrinites verus. Mill Mendip, Bristol. 
POLYPARIA. 
Gorgonia infundibuliformis, Goldf . . . . Arnsberg. 
G. antiqua (Fenestella antiqua, 
Lons.), Goldf. Arnsberg. 
Cyathophyllum flexuosum, Goldf Limerick. 
C. pentagoniim, Goldf. Namur. 
C. csespitosurn, Goldf. Chokier, Seilles. 
C. turbinatum, Goldf. Richelle. 
C. quadrigeminum, Goldf. Berneau. 
Astrea ananas, de Blainville (Cyatho- 
phyllum ananas, Goldf.) Namur. 
Favosites polymorpha, Goldf. Namur, Elberfeld. 
F. fibrosa, Goldf. Buffalo on Niagara River. 
It thus appearing that there are 47 species in the Eifel 
limestone which are common to the carboniferous limestone, 
it follows that they constitute about two ninths of the whole 
number found in the Eifel, the ratio being as 47 to 209. 
On the other hand, w^e have seen that the Eifel limestone 
contains 42 species which are common to the Wenlock lime- 
stone, or one fifth of its whole number, the ratio being as 42 
to 209. 
Hence, if we take these numbers as a guide, it may be said 
that the Eifel limestone is in a slight degree more nearly allied 
to the carboniferous limestone than it is to the Wenlock, the 
difference lying between the ratios of 2 to 9, and 2 to 10. 
From the numbers which have been given it also results, 
that the Wenlock limestone contains 95 species which are 
distinct from those of the Eifel; and the Eifel limestone 167 
species distinct from those of the Wenlock limestone; of w-hich 
47 species being also common to the carboniferous limestone, 
it follows that 120 species may be said to be distinctive of the 
Eifel, in contradistinction to the Wenlock and carboniferous 
limestones. 
