MEMOIRS OF THE GEOLOGICAL SURVEY OF GREAT BRITAIN. 
Palaeontology. Vol. I, 1912. 
Plate XIV. 
deb 
—a 
deb 
HHM 
2 B 2 C 2D 
2 E 
15 
TREPOSTOMATA. 
G. W. Lee & 
T. A. Brock, del. 
22239 
