TEREBRATULA, 
ANOMIA Linn. 
Gen. Cuar. Shell an eyual sided inequivalved bi- 
valve: beak of the largest valve prominent, 
perforated; a pair of curved surfaces on each 
side the beak, and two shelly elongated append- 
Wes fo "a 4hio hinae 
ages TOrm tie Mins. 
TEREBRATULA subrotunda. 
TAB. XV.—F. 1 and 2. 
Spec. Cyar. Circular, depressed, smooth; valves 
regularly and equally convex ; beak short. 
Soeemmmmmtieiimminness Tio 
Lewern three-fourths of an inch, rather wider than long ; 
slightly angular on each side the beak; the larger valve in 
some specimens a little deeper than the other. 
Found in the hardish Chalk about Hornisham in Wilt- 
shire, where they are often preserved of a beautifully silky 
lustre. The shells are scaly, and seem but little altered. 
My friend Mr. Meade has sent me specimens an inch and a 
quarter long from Cornbrach, inclining to a reddish colour, 
seemingly but very little altered, which may be a variety of 
this, but the perforated beak is more protruded, and the 
contour rather inclining to squarish. They were found ina 
soil partaking of Limestone with Ochraceous Iron. Dr. 
Sutton has sent me specimens from Suffolk: Lady ‘Ayles- 
ford kindly forwarded some to me from a Limestone quarry 
near Warwick, with curious crystals of pellucid Carbonate 
of Lime coyering the horn-like appendages of the hinge, 
and lining the shell, sce f. 2. It is abundant in many 
places. 
