Manchester Memoirs, Vol. xli. (1897), No. 0, 7 



Suture deep, whorls sharply convex above, sides almost 

 flat, broadly convex below. Ornament of strong raised 

 longitudinal lines, crowded on the shoulder, more widely 

 spaced below. 



Locality and Horizon : Bacup ; in " bullion -balls " of 

 the Bullion seam, lower coal-measures. 



Observations : Several specimens of this pretty little 

 shell were found by me in a bullion-ball which had been 

 partially calcined in order to extract the fossils. 



The species was associated with what appears to be a 

 small form of A nthracomya. 



It may be that this species belongs to the Pleuro- 

 tomaria, but the flattened spire and the absence of any 

 evidence of a sinus have led me to place it in the genus 

 Raphistoma. 



