AMMONITES rustictis. 
TAB. CLXXVIL 
Spec. Cha&. Depressed ; whorls few, gibbose, 
exposed ; with 6 or 8 conical tubercles upon 
the sides of each, and two rows of obtuse tu- 
bercles around the front ; aperture wider than 
long. 
W horls about three : the bases of the larger tubercles 
almost touch each other, and they expand nearly across 
the whorl ; the front of the whorl is very broad and 
flattish; the tubercles upon it are numerous, and but 
little elevated. Aperture quadrangular : the inner side 
concave, and much shorter than the others. 
A heavy clumsy shell, well characterized by its few 
large knobs, and broad front : it is a rare production of 
the lower chalk, at Comb Pyne, near Lyme, in Dorset- 
shire, and was lent me by the Rev, William Buckland 
