"It interested me much afterward to find these climbing trees do not form any particular family or genus. There is no order of plants whose especial habit is to climb, but species of many of the most diverse families, the bulk of whose members are not climbers, seem to have been driven by circumstances to adopt this habit. The orders Leguminosae, Guttifenae, Bignoniaceae, Moraceae, and others, furnish the greater number. There is even a climbing genus of palms (_Desmoncus_), the species of which are called in the Tupí language Jacitára. These have slender, thickly-spined, and flexuous stems, which twine about the latter trees from one to the other, and grow to an incredible length. The leaves, which have the ordinary pinnate shape characteristic of the family, are emitted from the stems at long intervals, instead of being collected into a dense crown, and have at their tips a number of long recurved spines. These structures are excellent contrivances to enable the trees to secure themselves by in climbing, but they are a great nuisance to the traveller, for they sometimes hang over the pathway and catch the hat or clothes, dragging off the one or tearing the other as he passes. The number and variety of climbing trees in the Amazon forests are interesting, taken in connection with the fact of the very general tendency of the animals also to become climbers." Of this tendency amongst animals Mr. Bates thus writes: "All the Amazonian, and in fact all South American monkeys, are climbers. There is no group answering to the baboons of the old world, which live on the ground. The gallinaceous birds of the country, the representatives of the fowls and pheasants of Asia and Africa, are all adapted by the position of the toes to perch on trees, and it is only on trees, at a great height, that they are to be seen. A genus of Plantigrade Carnivora, allied to the bears (_Cercoleptes_), found only in the Amazonian forests, is entirely arboreal, and has a long flexible tail like that of certain monkeys. Many other similar instances could be enumerated, but I will mention only the Geodephaga, or carnivorous ground beetles, a great proportion of whose genera and species in these forest regions are, by the structure of their feet, fitted to live exclusively on the branches and leaves of trees."