The biology of the frog (1907) (14577300830)

Identifier: biologyoffrog1907holm (find matches)
Title: The biology of the frog
Year: 1907 (1900s)
Authors: Holmes, Samuel J. (Samuel Jackson), 1868-
Subjects: Frogs
Publisher: New York : Macmillan
Contributing Library: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
Digitizing Sponsor: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library



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er rods of cartilage, which pass backward and upward oneither side of the throat and join to the prootic bones of theskull. On the inner side of the base of each cornu is a shortanterior process. The alary processes, flattened, distallyexpanded plates of cartilage, arise just behind the anteriorcornua. The postero-lateral angles of the body are producedto form the postero-lateral processes. The thyroid processesdiverge from the middle part of the posterior margin of thebody and lie on either side of the larynx, which they help tosupport. They are the only parts of the hyoid apparatus tobecome ossified. The Cartilaginous Cranium. — The skull of the frog iscomposed of cartilage to a much greater extent than in thehigher vertebrates. Only here and there does its origi-nal cartilaginous basis become converted into bone. The XIII THE SKELETON 235 various bones which constitute the skull may be divided asregards their origin into cartilage bones, which result from V J. § « o O XHBUC- fa
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