PLATE XV. 
Fig. 1. Tranchee de For£t. 
Opening in the Grande Couche in foreground. The white material on right side 
is the sandy underclay. 
Fig. 2. Grande Couche in l’Esperance. 
Banc des Roseaux at top on right side; the irregular Banc superieur rests on 
the Banc intermediare in the background. 
