23 
GRYPH/A incurva. 
TAB. CXIl.—Figs. 1 and 2. 
a ar ee 
Serc. Cuar. Elongated, very involute, right side 
an obscure lobe, lesser valve oblong, externally 
concave. 
Syn. Parkinson, Org. Rem. vol. lil. p. 209, t. XV. 
f.3. Walcot’s Bath Fossils, f. 34, p. 51 N. 
a 
So great is the curve of this that the point of the beak is 
often concealed ; when visible it is generally sharp, seldom 
showing any impression, ‘The curvature is very regular, 
extending about one turn and an half. The surface is 
much laminated and rather rugose. The sides are straight, 
widening gently towards the round front. The lid is ob- 
long, widened towards the front and truncated at the 
hinge, where it is very thick. ‘The curvature of the beak 
is sometimes, but rarely, oblique at the apex. The upper 
specimen, fig. 1, is from the Lias near Frethern, in 
Gloucestershire, by favour of Thomas Meade, Esq. Its 
incurvation seems to hide the mark of attachment, which, 
however, will be found distinct in many of the genus. 
My kind friend, Thomas Walford, Esq. long since. 
favoured me with the curious gregareous specimen, fig. 2. 
from Birdbrook, Essex; it resembles some I haye from the 
Cornbrash at Chatley, &c. 
