87 
TEREBRATULA pectita. 
TAB. CXXXVIIL —Fig. l. 
Spec. Char. Orbicular, gibbose, plicato -striated ; 
with a flatfish space extending from the front 
to the beaks ; beak of the lower valve promi- 
nent, slightly incurved ; back of the upper 
Valve straight, with an incurved beak. 
The length and breadth are nearly equal and almost 
double the depth : the plicae are small, rounded, and 
often furcate, hence they are not much larger at the 
margin than at the beaks. 
Furnished by the green sand stratum, at Horningsham, 
near Longleat, four miles west of Warminster, and may 
be considered characteristic of the stratum and is figured 
by Townsend and Smith. Mr. Meade has a larger speci- 
men from the same place. The figure in the French 
Encyclopaedia is ha.rdly satisfactory enough to be de- 
termined. 
TEREBRATULA Lyra. 
TAB. CXXXVIIL — Fig. 2. 
Spec. Char. Oblong, convex, with diverging fur- 
cated plaits ; beak of the lower valve greatly 
elongated, that of the upper valve short, in- 
curved. 
Length of the upper valve equal to twice its width ; 
the beak of the lower valve is probably equal to the 
length of the upper valve, it contains two longitudinal 
