PLATE XI. 
Fi S- Page 
1 a-d. Holopty chius fiemingi , Ag.; scales, external aspect, two 
from the abdominal, and two from the caudal region._ 
Upper Old Red Sandstone ; Dura Den. [26120 a.] 329 
2. Holopty chius ( Gflyptolepis ) leptopterus, Ag.; lateral aspect. 
—Lower Old Red Sandstone ; Garnrie. [P. 4042.] 334 
