. Chordate morphology. Morphology (Animals); Chordata. premaxilla. prefronta prenasal process foramen apicole parosphenoid prootic fenestra. pterygoid process ascending process —postorbital. basipterygoid process cranioquadrote fissure pterygoid process squamosal _ jugular \ endolymphatic foramen t"--'^ , _i foramen magnum notocriord canal Figure 4-12. Chondrocranium and some of the dermal bone rudiments observed in the head of an embryo (13-mm head length) of CrococJ/7us biporcofus. (After Shiino, 1914) Bird The head skeleton of the chicken, as an example of the bird, contributes several
. Chordate morphology. Morphology (Animals); Chordata. premaxilla. prefronta prenasal process foramen apicole parosphenoid prootic fenestra. pterygoid process ascending process —postorbital. basipterygoid process cranioquadrote fissure pterygoid process squamosal _ jugular \ endolymphatic foramen t"--'^ , _i foramen magnum notocriord canal Figure 4-12. Chondrocranium and some of the dermal bone rudiments observed in the head of an embryo (13-mm head length) of CrococJ/7us biporcofus. (After Shiino, 1914) Bird The head skeleton of the chicken, as an example of the bird, contributes several useful points to the discussion of the nature and evolution of the osseous system. The type of flight practiced by the bird demands a high level of development of the eye and brain for the coordination and direction of action. Both of these features are reflected in the head in OTHER TETRAPODS • 75. 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 Jollie, Malcolm. New York, Reinhold
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