GEOLOGY OF THE ISLE OF PINES, CUBA 369 
From Siguanea City the writer, in company with Col. T. J. 
Keenan and Dr. T. D. Atkinson, made the trip across Siguanea Bay 
to the peninsula extending out from the southwestern corner of the 
island. Here the bottom of the bay shallows very gradually out 
to the low shore and apparently the same general rise continues 
clear across to the “south coast,” a distance of three miles or more. 
The surface of this part of the peninsula consists of a hard “‘coral”’ 
limestone in the little pockets of which a rich humus soil has col- 
lected and which thus supports a rich, broad-leaved vegetation. 
On the “south coast,” at Caleta Grande, the sea was beating against 
a very rough and jagged coast with a cliff which in many places 
reaches a height of 80 or go feet. A narrow shelf projects out into 
the sea at a slight depth, bearing numerous projecting jagged rocks, 
and from this shelf the sea deepens very rapidly to the south. The 
surface of the coral limestone of this peninsula appears to have 
about the same general northeast dip as was seen in the Sierra 
de la Canada. 
