231 
AMMONITES Blagdeni. 
TAB. CCL 
Spec. Char. Subcylindrical, obtusely fluted,, urn- 
bilicate ; umbilicus reaching* to the margin, 
conical, with large radii terminating upon the 
edge in a tubercle ; aperture transverse, qua- 
drangular, three times as wide as long. 
The umbilicus is deep; it occupies the whole side ; the 
tubercles round its edges, about 22 in each turn, are ob- 
tuse in the cast of the inside, but where there are some 
remains of the outer surface they appear to be spiniform, 
there are four or five furrows on the front to each ; the 
frorif is very slightly convex. 
A massive specimen from the lower Oolite, containing 
Belemnites, other Ammonites, &c. : it was given me by 
my lamented friend. Dr. J. C. Lettsom. I have named 
it after the highly discerning, meritorious, yet most un~ 
assuming Sir Charles Blagden. The analogy between 
this and the preceding, may remind conchologists of the 
long cordial friendship, subsisting between Sir Charles 
and Sir Joseph Banks. 
