213 
AMMONITES elegans. 
TAB, XCIY— Upper Figure . 
Spec. Char. Involute,, much depressed, acutely 
keeled ; volutions about three, inner ones about 
two-thirds concealed; radii twice curved, nu- 
merous, equal; keel distinct, entire; aperture 
acutely triangular; internal angles truncate. 
A delicate species with a thin shell; thickness about 
one-sixth of the largest diameter; it gradually lessens 
towards the edge, which is rather obtuse with a sharp keel 
placed upon it. The septa are tolerably close with their 
sinuous margins much plaited ; the siphuncle slender within 
the keel. 
This species was gathered between li minster and Yeovil 
by Mr. Strangewayes, who possesses this beautiful speci- 
men ; I have a fragment of a larger one which was given 
me as British. The plaited margins of the septa are some- 
times beautifully conspicuous ; a few of the chambers being 
occasionally filled, as it is partially here, by spar of a 
darker tint; at other times it is more regular all over, 
pointing out the septa conspicuously, where otherwise they 
would not be discernible, as is particularly the case with 
some other species . 
