As the rainbow unites earth and heaven, Iris is the messenger of the gods to men; in this capacity she is mentioned frequently in the Iliad, but never in the Odyssey, where Hermes takes her place.
The astragalus has a pulley-like surface above for articulation into the tibia, but its lower surface is flattened and unites to a much greater extent with the navicular than with the cuboid, which bone is of comparatively less importance than in the Artiodactyles.
It unites with the Bafing.
Of Lake Tsana, unites its waters with a number of other rivers which also rise in the Abyssinian highlands, and flows north-west Boo m.
Below which it unites with the Don-Nai; and the two Vaicos, which join the Don-Nai close to its mouth.