IN THE GAWILGHUR HILLS. 297 
Eocplanation of Plate VIII. 
Fig, 1. View of a shell much contorted by pressure, ad- 
hering to the matrix, 
A A the shell. 
B B the matrix. 
% Petrified shell. 
3. Side-view of shell Fig. 2. 
4. 5. Other petrified shells. 
6. Side-view of Fig. 4. 
7. Side-view of Fig. 5. 
The sketch at the bottom of the plate represents the re- 
lative position of the beds of wacke, and clay contain- 
ing the shells, and of overlying nodular trap. 
A A Stratum of clay containing the fossil shells. 
B B Bed of nodular trap. 
C C Bed of wacke. 
D D Trees of Ficus Indica. 
E Surface of trap, covered with Andropogon contor- 
turn and nardus. 
