94 
* 
AMMONITES Gowerianus. 
TAB. DXLIX — fig. 2. 
Spec. Char. Compressed, radiated, with a spine 
upon each ray where it divides into three or 
four ; front rounded ; whorls convex, the inner 
ones half exposed, showing the row of spines ; 
aperture nearly orbicular. 
The radii upon this beautiful shell commence close to 
the inner edge of the whorl : they are numerous, pro- 
minent and sharp over almost half the side, there each 
is generally furnished with a large sharp spine, at the 
base of which it divides into three or more, prominent, 
obtuse, ring-shaped ridges that pass over the rounded 
front ; the length of the aperture occupies nearly one- 
third of the diameter of the disk. Its edge, which we 
have observed in only one specimen, is thin and gently 
sinuated near its inner termination. The spines dis- 
appear by degrees towards the aperture. 
From the roof of the Coal at Brora. It is named, at 
the request of my friend Mr. Murchison (to whom we 
are indebted for the specimen), in honour of the noble 
family in whose estates the district of Brora is situated. 
