Upper Surface of Frog Skull
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“Skull of frog. Upper surface-- Pmx., premaxilla; N., nasal; M., maxilla; Sq., squamosal; Q.j., quadrato-jugal; e.o., ex-occipitals; P.f., parieto-frontals; Sph.E., sphenethmoid; P.O., pro-otic.” -Thomson, 1916
Source
J. Arthur Thomson, M.A., LL.D. Outlines of Zoology (New York, NY: D. Appleton & Company, 1916)
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