220 BULLETIN: MUSEUM OF COMPARATIVE ZOÖLOGY. 
My researches at Santiago de Cuba, consisting of a section across 
the Sierra Maestra from the coast to the Rio Cauto, convinced me that 
the crystalline rocks of that region are Cretaceous and Post-Eocene 
Tertiary, and not Paleozoic, as asserted by Frazer; and I am more 
than ever inclined to doubt his conclusions and those of Bergt relative 
to Cuba and San Domingo. The descriptions of the region by Kim- 
ball are approximately correct and reliable. 
