[PLATE 16 | 
MONOGRAPH I PLY, 
( BASE OF OLD RED SANDSTONE.) 
elogien! Survey of the United Kingdom. 
ron 
a 
# 
€ Queen 
Lith?sto Th 
a 
Z: 
PERM CGCOMUS: WING CUS, Aas 
Bone, del et lith 
