. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Figure 15 —Brain of Aphilnpsfussirjer X \. Lateral view of intracranial cast. than that of the recent rhinoceros, and presents a marked advance upon that of Aceratherium occidenialc. The bulk of the fore- and mid-brain, or the divisions in front of the cerebellum, is approximately as follows : — Aceratherium, 420 Aphelops, 1240 Ceratorhinus, 720 The bulk of the entire brain is : Aphelops, 1470 c c. Ceratorhinus, 850 The relative body weight of the two animals can be roughly estimated from a compari
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Figure 15 —Brain of Aphilnpsfussirjer X \. Lateral view of intracranial cast. than that of the recent rhinoceros, and presents a marked advance upon that of Aceratherium occidenialc. The bulk of the fore- and mid-brain, or the divisions in front of the cerebellum, is approximately as follows : — Aceratherium, 420 Aphelops, 1240 Ceratorhinus, 720 The bulk of the entire brain is : Aphelops, 1470 c c. Ceratorhinus, 850 The relative body weight of the two animals can be roughly estimated from a comparison of the femora as Aphelops 4, Ceratorhinus 3. It thus appears that the steady brain growth of the ungulates during the Eocene and early Miocene periods reached its highest point in some fami- lies of the later Miocene, and was followed by a de- generation. The cerebellum in Aphe- lops is small and partly over- hung by the hemispheres. The lateral view of the hemispheres shows a very marked predominance of transverse sulci, which ra- diate from the vertical syl- vian fissure, S, so that in the basal view of the frontal lobes the fissures are antero-posterior. The dorsal surface of the cast is somewhat imperfect, giving an incomplete reproduction of the parietal and^occipitul regions. The .superior. Figure 16 •Brain of Ceratorhinus Sumatrensis X i- Lateral view of 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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