ORDER V. The GALLINÆ, have a convex bill; the superior mandible is vaulted over the inferior: The nostrils are half covered with a convex cartilaginous membrane; and the feet are divided, but connected, at the innermost joint.—This order contains 10 genera, viz. Otis, Struthio, Didus, Pavo, Meleagris, Penelope, Crax, Phasianus, Numida, Tetrao.