t43 
AMMONITES Bechei. 
TAB. CCLXXX. 
Srec. Cuar. Gibbose, umbilicate, radiated and 
concentrically striated, each side furnished with 
two rows of numerous small tubercles; radii 
numerous, thin; front rounded ; aperture large. 
SEE 
Ta aperture is as wide as long, and occupies half the 
diameter of the shell; the sides between the rows of 
tubercles are slightly flattened, the inner row is the 
highest ; the radii are nearly straight, about two to each 
tubercle, and sometimes one between the tubercles ; the 
umbilicus is deep, but not very large ; the strie are very 
regular, elevated, and numerous. 
The specimen before us is in the collection of Mr. De 
La Beche, whose name I have given to it, as a memorial 
of astanch and generous friend to science : he obtained it 
from the Blue Lyas at Lyme. I have seen an Ammonite 
with larger tubercles, fewer radii and different formed 
whorls, more resembling Am. Henleyi, tab. 172, but still 
I think distinct from both: had the specimen been suffi- 
ciently perfect I should have been glad to have given a 
figure next to this. It is from the sand beneath the 
inferior Oolite near Cropredy, and belongs to the Oxford 
Museum, presented by the Rev. W. D. Conybeare. 
