Devon and Corivwall, Belgium^ the Eifel, S^c. 399 



one third part; and in the Eifel limestone as 4 to 20, or one 

 fifth part. Again, in the Wenlock limestone, the distinct 

 species are to the common species as 9 to 4, or 2|^ to 1 ; and 

 in the Eifel limestone as 16 to 4, or 4- to 1. 



M. Beyrich has made the remark, that the greywacke and 

 slate country which supports the Eifel and Belgian lower 

 limestone, contains for the greater part the same fossils as 

 are found in this limestone; and he adds, that among them 

 occur a considerable number of species which are common to 

 the carboniferous limestone, and in this remark he is joined 

 by M. Dumont, as already observed : that this view is cor- 

 rect, the follovs^ing table which I have drawn up will suffi- 

 ciently prove. 



V. Table of fossils common to the Eifel limestone and the 

 carboniferous limestone — 47 species. 



Localities in carboniferous limestone. 



CrUSTACExA.. 



Calymene macrophthalma, Al. Brong. Richelle, Liege. 



MOLLUSCA. 



Heteropoda — 



Bellerophon undulatus, Goldf. Chimay, Schwelm. 



B. apertus. Sow , . Richelle, Bristol, Fermanagh. 



B. striatus, Goldf. Chimay, Ratingen. 



Cephalopoda — 



Orthoceras annulatum, Sow King's County. 



O. giganteura, Sow Closeburn. 



CONCHIFERA. 



Terebratula pugnus and lateralis. Sow. Ratingen, Derbyshire, Dublin. 



T. crumena, Sow Derbyshire. 



T. lacunosa (T. Wilsonii, Soiu.) 



Dahn , Liege. 



T. Mantias, Sow Ireland. 



T. acuminata, Sow Ratingen, Yorkshire, Derbysh. 



T. diodonta, Dahn Ratingen. 



T. amygdala, Goldf. Vise. 



T. sacculus, Sow Derbyshire, Rutherglen. 



Orthis testudinaria*, Dahn Cromford in Westphalia. 



Spirifera cuspidata (S. elevata, Dalm.) 



" Sow Ratingen, Bristol, Derbyshire. 



S. octoplicata (S. crispa, Dahn.), Derbyshire, Castlemaine in 



Sow Kerry. 



S. oblata. Sow. <, Richelle, Vise, Dublin. 



S. glabra et obtusa (Terebratula 



• Iffivigata, Schlot.), Soiu Richelle, Ratingen, Derbyshire. 



S. pinguis CS. lasvicosta, Goldf), 



Sow Liege, Dublin. 



S. attenuata. Sow Liege, Dublin, Clonmell. 



S. striatula, Goldf Ratingen. 



S. canalifera, Goldf. Ratingen, Vise, Dublin. 



* See Professor Bronn in Lethcsa Geognostica, p. 82. This is, I believe, 

 the only instance on record of an Orthis having been found in the carbon- 

 iferous limestone. 



