corpulent iguana fast asleep on some branch, and too late to drop from his resting-place. In the forest I always saw the "pisoti" hunting in large bands, from which an iguana would have small chance of escape, for some were searching along the ground whilst others ranged over the branches of the trees. Other tree-lizards also try to escape their enemies by dropping from great heights to the ground. I was once standing near a large tree, the trunk of which rose fully fifty feet before it threw off a branch, when a green Anolis dropped past my face to the ground, followed by a long green snake that had been pursuing it amongst the foliage above, and had not hesitated to precipitate itself after its prey. The lizard alighted on its feet and hurried away, the snake fell like a coiled-up watch-spring, and opened out directly to continue the pursuit; but, on the spur of the moment, I struck at it with a switch and prevented it. I regretted afterwards not having allowed the chase to continue and watched the issue, but I doubt not that the lizard, active as it was, would have been caught by the swift-gliding snake, as several specimens of the latter that I opened contained lizards. Lizards are also preyed upon by many birds, and I have taken a large one from the stomach of a great white hawk with its wings and tail barred with black (Leucopternis ghiesbreghti) that sits up on the trees in the forest quietly watching for them. Their means of defence are small, nor are they rapid enough in their movements to escape from their enemies by flight, and so they depend principally for their protection on their means of concealment. The different species of Anolis can change their colour from a bright green to a dark brown, and so assimilate themselves in appearance to the foliage or bark of trees on which they lie. Another tree-lizard, not uncommon on the banks of the rivers, is not only of a beautiful green colour, but has foliaceous expansions on its limbs and body, so that even when amongst the long grass it looks like a leafy shoot that has fallen from the trees above. I do not know of any lizard that enjoys impunity from attack by the secretion of any acrid or poisonous fluid from its skin, like the little red and blue frog that I have already described, but I was told of one that was said to be extremely venomous. As, however, besides the repute of giving off from the pores of its skin poisonous secretion, it was described to be of an inconspicuous brown colour, and to hide under logs, I should require some confirmation of the story by an experienced naturalist before believing it, for all my experience has led me to the opinion that any animal endowed with special means of protection from its enemies is always either conspicuously coloured, or in other ways attracts attention, and does not seek concealment.