The Jaws of the Cretaceous Toothed Birds, Ichthyornis and Hesperornis

Abstract

The remarkable Cretaceous birds with teeth, widel; cited in paleontological and biological literature as an intermediate evolutionary stage between reptiles and modern birds, are known almost exclusively from the monograph "Odontornithes" and a few preliminary publications by 0. C. Marsh, their discoverer.Marsh' s reconstructions have been copied extensively and formed the basis for discussions of relationships by Fiirbringer, D' Arcy Thompson, Lucas, Wetmore, and others