32 
veirse ridge along its middle : the spines are very small, 
and only worthy the name on the lesser whorls. The 
variety here figured is curious, on account of a deep 
groove along the upper part of the whorls around the 
whole of the spire ; the species may, however, be dis- 
tinguished, by the constantly rounding upper part of the 
whorls, and the spines being less prominent. I am fa- 
voured with this curiosity from Barton Cliff, by the Rev. 
W. Bingley. 
