50 
of the geological volumes are ready for the press, to be followed 
by those dealing with the botany and vegetable resources, the 
Virgin Islands the ke ey to natural science knowledge of the 
West Indies. 
The objects of this trip were to supplement our information 
coastal plains and to the higher mountain summits of the cen- 
tral distri 
rom our base at Coamo Springs, occupied for seven weeks, 
ts from Juana Diaz t b 
we studied the southern districts fro Diaz to Yabucoa 
the valley of the Coamo River and contiguous hills being given 
the most intensive exa ti All the lower part of this 
of a mas: cret m forming the Coamo Reservoir, and 
Jed by distributing canals through the. sugar-cane fields for 
several miles he southern coast. The eral affluents 
during our visit, h howers over the water-shed were re- 
flected in sudden rises which gave anxiety about the passage 
f fords b te) ar. Numerous deep arroyos, d. t this 
p 
which are cut into the Santa Isabel formation, are a physio- 
tia ended 
