166 
TEREBRATULA nuciformis. 
TAB. Dll.— Jig. 3. 
Spec. Char. Transversely oblong, globose, regu- 
larly plaited ; front elevated ; beak produced ; 
plaits 30, rounded. 
Smaller than a hazel-nut. The edges of the plaits are 
rounded, and near the front often have a sunk line upon 
them. The specimens being empty, show the arched 
processes from the hinge neatly preserved. 
Found near Farringdon by Mr. Sowerby in 1809, in a 
pit called a gravel pit rendered remarkable by a great 
number of cup-shaped fossils, which Mr. S. proposed to 
call Spongia pezizoides (see Brit. Mineralogy, tab. 482, 
and Linn. Trans, x. 405). 
TEREBRATULA acuta. 
TAB. Dll.— Jig A. 
Spec. Char. Transversely oblong, gibbose, large- 
ly plaited; front elevated with 6 plaits, of which 
the lateral ones are the largest ; beak slightly 
produced ; plaits 20, sharp. 
The strong resemblance of this to the others before us 
is very striking ; but the sharpness of the plaits, and the 
size of those especially that bound the elevated front, al- 
though variable, will distinguish it; the beak is also 
smaller and more curved. 
Presented by Miss E. Warne, who obtained a good 
series from ochraceous Limestone at Cleeve Hill near 
Cheltenham in 1820. 
