39 
NAUTILUS discus, 
TAB, XIII. 
Spec. Char. Depressed, edge fiat, aperture oblong, 
volutions not concealed by each other. 
About four inches in diameter ; greatest thickness or 
width of the aperture half an inch. Turns of the spire about 
five. Chambers very numerous. Septa distant from each 
other about one eighth of an inch. Outer edge of the aper- 
ture narrower than the inner one, notched, owing to a small 
groove which runs round the outer edge of the shell. Si- 
phunculus nearer to the inner edge of the septa. 
This specimen was found in the dark Limestone formation 
near Kendal, and was actually sent me as a petrified sheep’s 
horn. Unfortunately the outer part of the shell, or as it 
was called the horn, was lost. As I had not any specimen 
resembling this in my collection, I considered it as rare# 
In the early part of this work, we shall not be able to distin- 
guish rarities or localities so well as might be expected % 
that deficiency, however, now Geology is so much attended 
to, will be supplied as we advance. 
