The iguana will let go his hold and straightway make for a kind of fern, which he eats in considerable quantities, the object of this being to counteract the effects of the poison.

When he thinks he has had enough of the antidote he rushes back to the scene of the encounter and resumes the attack; _the snake always waits there for him_.

Again and again the snake bites the iguana, and as often the latter has recourse to the counteracting influences of the antidote.

The fight may last for upwards of an hour, but eventually the iguana conquers.

The final struggle is most exciting.
The iguana seizes hold of the snake five or six inches below the head, and this time refuses to let go his hold, no matter how much the snake may struggle and enwrap him in its coils.