48 



1 HIS differs from Euomphalus Catillus in the much greater 

 height of the whorls and their inclined sides, which give it 

 the form of a deeply truncated cone or an inverted cup. 

 It is a rather a rare shell in the carboniferous limestone of 

 Bolland, and also in that of Kildare in Ireland, where it 

 acquires a considerable size. 



EUOJMPHALUS Puffilis var. bifrons. 



&* 



TAB. DCXXXIIL— /g. 2. 



Syn. Euomphalus bifrons, Phill. Yorks.pt.2. 22b. 

 pi. 13./ 4. Morris. Cat. 144. 



XlAviNG examined several individuals of this and the E. 

 pugilis (t. 621.), in which the tubercles of the underside are 

 various in elevation, I have come to the conclusion that they 

 are only varieties of one species. The specimen figured is 

 in Mr. Gilbertson's collection in the British Museum. 



