Ocoa river, difficulty in crossing, [222]–225
Orchids, beauty and number of species of, in the tropics, [161]–163, [359]
Ordaz, Diego de, an officer under Cortez, explores the Orinoco, [140]–142
Orinoco, delta of, described by Sir Walter Raleigh, [70], [71];
exuberant vegetation of, [75];
stories about Indians having houses on tops of trees in, [76], [78];
exploration of, by A. E. Level, [80], [81];
inhabitants of, [81]
Orinoco river, first view of, [72];
magnitude of, [82];
scenery along, [83];
fauna in valley of, [85], [86];
steamers on, [87];
travelers on, [88], [89];
erroneous notions about, [114]–119;
insects along, [114];
temperature in valley of, [116], [117];
temperature and turbidity of water of, [133]
Orocué, capital of a prefecture, described, [166]
P
Palms, number of species and uses of, [78], [79], [203], [204], [371]–374