. Journal of morphology. e dawn of quadrupeds in North America. Pop. , vol. 72, p. 565, fig. 5. 1908 The lateral line system in extinct amphibia. Jour. Morph., , p. 522, figs. 9, 9a, 10. 1908 Carboniferous quadrupeds. Trans. Kans. Acad. Science, , p. 243. 1909 The Microsauria. Geol. Mag., Dec, vol. 6, p. 220. WiLLisTON, S. W. 1908 The skull and extremities of Diplocaulus. Acad. Science, vol. 22, p. 122, pis. 1-6. Describes more fullyDiplocaulus limbatus Cope, locates Diplocaulus in Microsauria. 1910 Dissorophus. Journ. Geol., vol. 18, p. 534. Gives list of Pe
. Journal of morphology. e dawn of quadrupeds in North America. Pop. , vol. 72, p. 565, fig. 5. 1908 The lateral line system in extinct amphibia. Jour. Morph., , p. 522, figs. 9, 9a, 10. 1908 Carboniferous quadrupeds. Trans. Kans. Acad. Science, , p. 243. 1909 The Microsauria. Geol. Mag., Dec, vol. 6, p. 220. WiLLisTON, S. W. 1908 The skull and extremities of Diplocaulus. Acad. Science, vol. 22, p. 122, pis. 1-6. Describes more fullyDiplocaulus limbatus Cope, locates Diplocaulus in Microsauria. 1910 Dissorophus. Journ. Geol., vol. 18, p. 534. Gives list of Permianamphibia of North America. PLATE 1 EXPLANATION OF FIGURES 1 Dorsum of skull of Diplocaulus magnicornis Cope. Infraorbital canal atpoint of arrow. X 2. 2 Ventral surface of the mandible. The operculo-mandibular canal at thepoint of the arrow. X 5. 3 Oblique view of one ramus of the mandible to show the entire course of theoperculo-mandibular canal. Nearly natural size. 40 DIPLOCAULUS MAGNICORNIS ROY L. MOODIE PLATE 1. JOURNAL OF MORPHOLOGY, VOL. 23, NO. 1 41 PLATE 2 EXPLANATION OF FIGURES 4 Outline of the cranial elements of Diplocaulus magnicornis Cope. E, epiotic;F, frontal; J, jngal; Mx, maxilla; N, nasal; P, parietal; Pf, postfrontal; Po, post-orbital; Pr, prefrontal; Px, premaxilla; Qj, quadratojugal; So, supraoccdpital;Sq, squamosal; St, supratemporal. 5 Mandible from the side to show arrangement of the operculo-mandibularcanal. 6 Outline of the openings and elements of the palate of the skull. ., internalnares; Co, condyle; Ep, epiotic; Es, auditory fossa or ear slit; Exo, exoccipital;Mx, maxilla; Pa, parasphenoid; Paf, palatine foramen; Pal, palatine; Pi, ptery-goid; Px, premaxilla; Q, quadrate; Qj, quadratojugal; T, ectopterygoid or bone. 7 Side view of the skull. J, jugal; Mx, maxilla; Pr, prefrontal; Px, premaxilla;Qi, quadratojugal; .S7. squamosal. 42 DIPLOCAULUS MAGNICORNCS ROT L. MOODIE PLATE 2
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