. Transactions of the American Philosophical Society. FCg-. 7. A M Westercrren del. Mi Figs 13,5, 7. 8,9 MEGALONYX LEIDYI LmdahlV 2,^,6 „ JEFPERSONI Harlan W. Schlachtei. Stochholm, Sweden. I ARTICLE 11. ON THE HOMOLOGIES OF THE POSTERIOR CRANIAL ARCHES IN THE REPTILIA. BY E. D. COPE. Read before the American Philosophical Society, February 5, 1892. At the meeting of the American Association for the Advancement of Science,held in Troy, IN. Y., in 1870,1 presented the result of my studies of the arches whichdistinguish the posterior part of the cianium in the Vertebrata, and especi
. Transactions of the American Philosophical Society. FCg-. 7. A M Westercrren del. Mi Figs 13,5, 7. 8,9 MEGALONYX LEIDYI LmdahlV 2,^,6 „ JEFPERSONI Harlan W. Schlachtei. Stochholm, Sweden. I ARTICLE 11. ON THE HOMOLOGIES OF THE POSTERIOR CRANIAL ARCHES IN THE REPTILIA. BY E. D. COPE. Read before the American Philosophical Society, February 5, 1892. At the meeting of the American Association for the Advancement of Science,held in Troy, IN. Y., in 1870,1 presented the result of my studies of the arches whichdistinguish the posterior part of the cianium in the Vertebrata, and especially in theReptilia. Three arches were considered, which were named, commencing with theinferior in position: the quadratojugal, the zygomatic and the parietoquadrate. Ofthese the only arch recognized as occurring in the Mammalia was the zygomatic*In the determination of this arch I followed Cuvier,f and for the following was supposed that the quadrate bone represented one of the ossicula auditus. Asthis element in the Mammalia is intracranial, a
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