. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 90 Bulletin Museum of Comparative Zoology, Vol. 156, No. 1. Figure 4. Comparison of inner ear endocasts of cynodonts and primlfive mammals. (A) A generalized inner ear endocast of a dicynodont (modified from Olson [1944] and Cox [1962]). (B) A generalized inner ear endocast of Thhnaxodon (a composite figure based on descriptions and figures of Olson [1944], Fourie [1974], and illustrations by courtesy of Dr. Allin). (C) Probele- sodon (modified and reversed from Quiroga [1979]). (D) Probainognathus (modified from Alli

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. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 90 Bulletin Museum of Comparative Zoology, Vol. 156, No. 1. Figure 4. Comparison of inner ear endocasts of cynodonts and primlfive mammals. (A) A generalized inner ear endocast of a dicynodont (modified from Olson [1944] and Cox [1962]). (B) A generalized inner ear endocast of Thhnaxodon (a composite figure based on descriptions and figures of Olson [1944], Fourie [1974], and illustrations by courtesy of Dr. Allin). (C) Probele- sodon (modified and reversed from Quiroga [1979]). (D) Probainognathus (modified from Allin [1986]). (E) Yunnanodon (baaed. 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum

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