Plate III. 



Figure i. -The western end of " Black Hill,"— the remains of the volcano of Low Layton, now 

 unconformably covered by the Layton Series and the Liguanea Series. 



FiGl'RE 2. — Mil 



>l I'orl Antonio, which town is situated oi\ ;in 

 a terrace. 



.•vated b.iso Ic 



