The fer-de-lance, so dreaded
in Martinique, and the equally dangerous bushmaster of Guiana are
included in this genus. A dozen species are known in Brazil, the
biggest one being identical with the Guiana bushmaster, and the most
common one, the jararaca, being identical, or practically identical
with the fer-de-lance. The snakes of this genus, like the rattlesnakes
and the Old World vipers and puff-adders, possess long poison-fangs
which strike through clothes or any other human garment except stout
leather. Moreover, they are very aggressive, more so than any other
snakes in the world, except possibly some of the cobras. As, in
addition, they are numerous, they are a source of really frightful
danger to scantily clad men who work in the fields and forests, or who
for any reason are abroad at night.
The poison of venomous serpents is not in the least uniform in its
quality. On the contrary, the natural forces--to use a term which is
vague, but which is as exact as our present-day knowledge permits--
that have developed in so many different families of snakes these
poisoned fangs have worked in two or three totally different fashions.
Unlike the vipers, the colubrine poisonous snakes have small fangs,
and their poison, though on the whole even more deadly, has entirely
different effects, and owes its deadliness to entirely different
qualities.
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