. Elements of geology : a text-book for colleges and for the general reader. Geology. CRETACEOUS ANIMALS. 489 longing to the two genera Ichthyornis and Apatornis, were ivffliout the horny Ibeak so characteristic of existing birds, but instead had thin,. Fig. 819.— Restoration of Ichthyornis victor (after Marsh). One half natural size. long, slender jaws, furnished with many sharp, conical teeth, set in sockets, twenty on each side below, and somewhat fewer above (Fig. 819). Their vertebrae were amphicoelous or bi-concave, as in fishes and many extinct reptiles, but in no modern bird (Fig. 821)
. Elements of geology : a text-book for colleges and for the general reader. Geology. CRETACEOUS ANIMALS. 489 longing to the two genera Ichthyornis and Apatornis, were ivffliout the horny Ibeak so characteristic of existing birds, but instead had thin,. Fig. 819.— Restoration of Ichthyornis victor (after Marsh). One half natural size. long, slender jaws, furnished with many sharp, conical teeth, set in sockets, twenty on each side below, and somewhat fewer above (Fig. 819). Their vertebrae were amphicoelous or bi-concave, as in fishes and many extinct reptiles, but in no modern bird (Fig. 821). Like modern birds, however, they had a keel on the breast-bone for the attachment of the powerful muscles of flight. The tail also is worthy of atten- tion, being not like that of the Jurassic Archseopteryx, but much shorter and not so reptilian (Marsh). These birds were about the size of a pigeon, and were evidently powerful fliers. Fig. 819 is a restora- tion by Marsh of one of this type. The other toothed birds had similar. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original LeConte, Joseph, 1823-1901. New York : D. Appleton and Co.
Size: 1369px × 1825px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectgeology, bookyear1892
