382 Scientific Intelligence. 
IL GroLtogy anp NatruraL HistTory. 
1. Notes on the Island of Curagao; by W. M. Gass. (Letter 
to J. D. Dana, dated Curagao, Jan. 20, 1873.)—Curagao is one of 
a series of barrier islands lying off the coast of Venezuela, at a 
distance of about 30 to 40 miles from the main land. It is a long 
barren strip, nearly 40 miles long, with a trend to the southeast. 
Its surface is in the main flat, and but little elevated above the sea 
e geological structure is extremely simple. There is but one 
rock formation and that is what I have termed the “ Coast lime- 
stone” in my memoir on Santo Domingo. (Trans. Amer. Phil. Soc.) 
. ? 
But I suspect that deep quarrying would develop this “ chalk, 
since it occurs in most if not all of the other islands, at a depth 
beyond the reach of atmospheric influences. 
a 8, 
floating on top of the sea water, which percolates through all the 
cracks and cavities of the rock. 
Trans. and Quart. Jour. Geol. Soc.) ‘ 
The stratification of the rock is usually horizontal or nearly 80; 
but the few hills in the vicinity of the city show that the island 
B e e 
a 7 
a, a, sea level; B, citadel back of the town, about 130 feet high; ¢, ¢ ¢ — 
rolling plain; d, d, table land bordering the north coast; ¢, ¢, high hill (100 ft.) 
off the line of section. 
oop rolling surface, but with an elevation so much less than the 
8, that it can only be accounted for by the existence of a fault. 
North of this again, bordering the north coast, at least in part, is 
