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TEREBRATULA Flabellula. 
TAB. DXXXV.—fig. 1. 
Spec. Char. Depressed, plaited ; plaits about 16, 
simple, rounded ; lesser valve transversely ob- 
ovate ; larger valve with a straight rectangular 
projecting beak. 
A small species, with only a triangular aperture to the 
beak : the front is even ; that is, no part of its margin 
is elevated. 
From the Ancliffe Oolite. 
TEREBRATULA furcata. 
TAB. D XXXV.— jiff. 2. 
Spec. Char. Nearly orbicular, plaited ; plaits 
rounded, about 9, forked when full-grown ; 
the larger valve most convex, its beak large, 
curved. 
About the same size as the last. When young, the 
plaits are simple and the sides angular : when old, the 
plaits are forked and the sides round ; the front is even, 
the beak has a circular aperture. 
Common at Ancliffe. 
