207 
AMMONITES jugosus. 
TAB. XCIl.—Fig. 1. 
+ 
Spec. Cuar. 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. 
—— 
"Tur 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. 
Volutions 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. Strangewayes, 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 septe, as well as the 
crystals of Carbonate of Lime lining the chambers; the 
shell itself is attached to the stone, it is very thin. 
