227 
TEREBRATULA ovoides. 
TAB. C.—Upper figure. 
Spec. Cuar. Ovate, elongated; beak prominent ; 
larger valve gibbous subcarinated ; lesser valve 
convex. 
"Vue sides have an obtuse angle or shoulder at about one- 
third the length from the beak ; more or less prominent in 
different specimens. Length almost twice the width; the 
front rounded, undefined. 
Found in blocks of Sandstone containing green Sand, in 
alluvial deposits of Gravel, fragments of Chalk, &c. in some 
parts of Suffolk, by my friend, Charles Wilkinson, Esq. 
TEREBRATULA lata. 
TAB. C.—Lower figure. 
Spec. Cuar. Orbicular, depressed; beak promi- 
‘nent; larger valve subcarinated at the back. 
Tue length and breadth of the smaller valve are equal. 
There is no perceptible difference between this and ovoides, 
excepting in the length. ‘ 
Found in blocks of Sandstone in the same situation as the 
last, at Gisleham, near Lowestoft, in Suffolk, by Mr. John 
Thurtell: the stone often contains grains of an argillaceous 
Iron ore. 
TEREBRATULA ornithocephala. 
TAB. Cl.—Figs. 1, 2, and 4. 
Spec. Cuar. Ovato-rhomboidal; depressed when 
young; elongated and gibbous when old; front 
straight, bounded by two obtuse lateral de- 
pressions, similar in each valve. 
i 
"Tue aperture in the elongated beak is large. Breadth of the 
shell equal to four-fifths of its length: the sides being rather 
