207 
AMMONITES jugosus* 
TAB. XCIL-Fig. 1. 
Spec. Char. Involute, depressed, keeled; inner 
whorls half concealed ; radii large, obtuse, 
straight, equal to the space between them, 
disappearing on the front ; keel small, distinct; 
aperture ovate, narrowest at the front. 
The radii have much the form of undulations, but they 
are straight and very regular, like some kinds of furrows 
in a Gardener’s ground: the keel which is sharp on the 
outside of the shell is almost lost in the cast. The septa 
are not very numerous ; their margins are moderately plaited. 
Y olutions four or more. Aperture two-fifths the diameter of 
the shell, and one-fifth wide. The shell thin and tender. 
This pretty specimen is from Mr. Strange way es, a warm 
enquirer after the information the study of Fossils affords;- 
it was broken out of Limestone at White Lackington Park 
near Ilminster, and shows the distant septae, as well as the 
crystals of Carbonate of Lime lining the chambers; the 
shell itself is attached to the stone, it is very thin. 
