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Cayos Neuvo Canal. It is scarcely a mile long and rises to an 
altitude of about 60 feet, its banks are very rough and rocky. 
The hill itself is made up of lime rock, large boulders forming 
the surface, the interstices being filled with rich blackish soil 
which supports a rather dense forest growth. Some of the trees 
attain a large size and remind one very much of Cayo Paloma. 
Large specimens of a columnar Cereus were very plentiful. One 
of these protected from the wind by a clump of trees was fully 
20 feet tall, its upright branches spreading across a distance 
equaling its height and supported by a short trunk fully one 
foot in diameter. Flowering specimens of this cactus were 
was very abundant here and I collected cuttings of what appeared 
to be five distinct forms. The iguana, a large lizard, was fre- 
quently seen on these rocky islands. These cays are occasionally 
visited by boatmen in search of fresh water which accumulates in 
the crevices of the lime rock, in the rainy season. They call it 
“agua dulce” and ‘‘agua buena,”’ but it is neither sweet nor good, 
if the supply we secured was a fair indication of its quality. 
From these small islands we crossed the eastern end of Perros Bay, 
landing on a white, sandy beach, fringed with Conocarpus and 
backed by a thicket of Afetopium, behind which was the ever- 
present laguna. The most interesting plant seen here was a large 
round-topped, red-barked, Malpigiaceous tree. 
The boatman having announced that we were now on Cayo 
Cocos—the accuracy of which I, however, doubted—and as it 
was quite apparent that it would be folly to attempt to carry out 
the original plan of going around Cocos, we sailed northeastward, 
intending to go through Paredon Channel and endeavor to follow 
along the seaward coast of that cay for some distance, in order to 
make several landings before turning “homeward” via Cayo Pare- 
don Grande, Cayo Cruze and the seaward side of Romano; but 
after several hours of tacking, poling and sticking on the mud ina 
very shallow body of water, the boatman announced that the 
