4 
drawn envelloped in a rough piece of Limestone on the 
road near Chatley; it is much stained with rust of Iron, 
but was said to have been brought from Kellaways Bridge. 
Much of the shell is sometimes preserved of a dirty or 
ochraceously-stained white; it is rather thick, and does not 
seem much altered: in the older shells it is generally broken 
away, especially in the latter whorl, where perhaps the 
chambers have not been formed, as well as lower down, 
where the divisions are perhaps not so strong, on account 
of the breadth of their construction: the cast in this case 
exhibits something of swollen large undulations, but rarely 
the costz, and would not, if detached, be known as part of 
the same shell. It is composed of sandy Limestone; the 
chambers contain crystallized Carbonate of Lime: in some 
cases no vestige of the siphuncle could be perceived, but 
Fig. 1 shows it near the upper edge. 
Fig. 3 exhibits a specimen given me by the Rey. H. 
Steinhauer: it seems to be a much rarer variety than the 
other, and is seldom found so perfect; it has similar bi- 
valves, &c. about its matrix as the other has, denoting a 
similar locality. This was taken out of a piece about two 
inches in diameter; it distinctly shows the siphuncle which 
is coloured black, whereas the rest of the shell is nearly 
white Carbonate of Lime. Possibly good specimens might 
prove this beautiful little shell to be a distinct species: it 
differs in having a rather rounded front, the edges of which 
are defined by sharpish tubercles just on the bend of the 
radii; the radii also are more prominent near the centre, 
and the aperture rather lunulate. 
