89 
NAUTILUS lineatus. 
TAB. XLI. 
Spec. Char. Flatted spheroidal, umbilicate, sur- 
face obscurely striated., back flat, broad, with 
a concave line in the interior (which appears 
convex around the cast). Aperture rather 
square, deeply indented by the preceding whorl;* 
septa numerous. 
Diameter about one-third longer than the thickness. 
The septa are very concave, with three slight waves in 
their margins. The siphunculus is near the middle of 
each septa. 
This specimen is from Comb-down near Bath, and is in 
the possession of my kind friend Thomas Meade, Esq. whose 
collection of Fossils is very valuable. I have it also from 
the Bristol road. I have seen but few specimens of this 
species, which is so similar to others, that the line passing 
around the interior of the shell, shown on the surface of the 
cast, becomes an important distinction, and appears con- 
stant. It is said to belong to what is called the inferior 
Oolite ; and from the division of the chambers, has, like 
others which have been thus divided, been compared to a 
lobster’s tail. I believe it is often much larger. The 
substance is not always favourable to the perfect division of 
the septa. The lower figure is added to show the siphun- 
culus; ’tis taken from a specimen I picked up between 
Bath and Bristol. 
