47 



furnished to me by Mr. Morris, contains the necessary in- 

 formation respecting its geological position. " E. carbona- 

 rius, which is very common in the shales near Glasgow 

 and also frequently found in the lower limestone shale at 

 Denwick Lane near Alnwick, at North Sunderland, and 

 Buddie Bay in Northumberland. At the latter locality it 

 is associated with Chonetes sarcifiulata {Leptana lata^ Sil. 

 Syst.) and Possidonomya tuherculata [Possidoiiia, Geol. 

 Trans. 2nd ser. v. 5.), the shales being considerably altered 

 by their proximity to a trap dyke. This species appears 

 to be a characteristic shell of the lower carboniferous shales, 

 for I believe it has not hitherto been found in any of the 

 upper members of the carboniferous system." 



EUOMPHALUS Calyx. 



TAB. DCXXXIII.— /g-. 8, 9 Sf 10. 



Spec. Char. Discoid, thick, very concave be- 

 neath ; margin broad, inclined upwards, bound- 

 ed by two carinas ; aperture triangular, its 

 upper edge shortest. 



Syn. Euomphalus Calyx, PM/. Yorks.pt. 2,2%b, 

 pi. 13. f. 3. Morris, Cat. U^. 



