Note 68 — THE NOCTURNAL LIFE OF ANIMALS IN THE PRIMEVAL FOREST.
Elizabeth Juliana Sabine translation
p. 269.—“The fresh-water dolphin.”
These are not sea-dolphins, ascending the rivers for a great distance, as is done by some species of Pleuronectes (flat fish, which always have both eyes on one side of the body); for example, the Limande (Pleuronectes Limanda), which comes up the Loire to Orleans. Some sea forms of fish, as dolphins and skates, are repeated in the great rivers of both continents. The fresh-water dolphin of the Apure and the Orinoco differs specifically from the Delphinus gangeticus, as well as from all sea-dolphins. See my Rel. hist. T. ii. pp. 223, 239, 406–413.