Note 3 — VOLUME XI

The transition from the Antilles to Guiana is, however, rather more marked than is that from the Orinoco to the Amazonian regions. Virtually the whole South American region bounded by the Andes, the Caribbean Sea, and the Argentinian Pampas is one ethnographically; so that, in the present work, Chapters VIII and IX are descriptive of a single region. However, the great rivers have always been natural routes of exploration, and this has given to the river systems an ethnographically factitious, but bibliographically real differentiation.