AMMONITES Catillus. 
TAB. DLXIV.—fig. 2. 
Spec. Cuar. Discoid, thin, with obscure, tubercu- 
lar elevations near the narrow, obtuse edge ; 
inner whorls one-third exposed ; aperture lan- 
ceolato-sagittate with obtuse angles. 
ee 
A very flat species with only three or four whorls; the 
surface of it is even, except a row of short tubercles on 
each side the margin, which degenerate into obscure 
waves upon the outer whorl. It might possibly be taken 
for a compressed specimen of A. varians, but it wants 
both the carina and radii, vestiges of which are distin- 
guishable in the most flattened specimens of the A. va- 
‘rians. 
Found in the Malm-rock of Sussex (Upper Greensand) 
in a quarry at Nursted near Petersfield. We are indebt- 
ed to Mrs. Murchison for the discovery. The figure is 
two-thirds of the diameter of the specimen, which is 
above six inches wide and only nine-tenths of an inch 
thick. 
