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depressed, produce an obtuse angular projection on the 
front. 
I have specimens of this from the Cornbrash Limestone, 
at Chatley, from Thomas Meade, Esq. and. others picked 
out of the Blue Lias (Marle), at Pickeridge, by favour of 
Miss Hill. The left-hand upper figure is from a Cornbrash 
Limestone specimen, and figure 4 is a young depressed 
shell, from Pickeridge. 
TEREBRATULA lampas. 
TAB. Cl.—Fig. 3. 
Spec. Cuar. Ovato-rhomboidal gibbous; front 
straight, produced, lesser valve depressed. 
Crosriy resembling the last, but the sides are not concave, 
the sides of the larger valve being only slightly so; the 
flatness of the other valve gives the whole much of the 
contour of an antique earthen lamp. 
My figure is from a cast in ferruginous Sandstone, from 
near Lyme, Dorsetshire, where I believe they are com- 
mon in this state. 
TEREBRATULA obovata. 
TAB. Cl.—Fig. 5. 
Spec. Cuar. Obovate, transverse, gibbous, flattish ; 
beak prominent; front straightish, bounded by 
two obsolete plaits. 
SE 
A very short shell, with rounded sides and a_ flattish 
margin; the length, excluding the beaks, is rather less than 
the width; the plaits which bound the front are sharp, but 
small, and only marginal. 
A specimen from Mr. Meade’s garden, at Chatley. It 
differs from the Chatley variety of Terebratula digona, 
tab. 96. in being much shorter, and in the points or plaits 
at the front being very obscure. 
