229 
AMMONITES Banksii. 
TAB. CC. 
Spec. Char. Discoid, very thick ; inner turns ex- 
posed ; sides concave, largely tuberculated ; 
front fluted, slightly convex ; aperture trans- 
verse, almost three times as long as wide. 
A very bold formed shell ; the narrow sides of the 
whorls are much relieved from each other, they are con- 
vex, and occupied by about 10 large obtuse tubercles : 
the great width of the convex margin, which is obtusely 
fluted, gives the whole a very massive appearance. There 
are about five turns, the last but one is in diameter equal 
to the thickness of the whole. 
In a valuable packet of fossils belonging to the inferior 
Oolite, sent by some disinterested friend at present un- 
known to me, from the west of England, was the pon- 
derous mass represented in this plate ; it contains the 
ferruginous grains peculiar to that rock, with Belemnites, 
fragments of other shells, and also a piece of wood, 
changed almost into charcoal. I hope my friend will 
make himself known, and communicate the locality. 
I have indulged my feelings of esteem and friendship, 
by giving this magnificent Ammonite the name of that 
staunch supporter of science in general, and of natural 
history in particular, who has presided so long and so 
ably over the Royal Society. 
