. Anatomischer Anzeiger. Anatomy, Comparative; Anatomy, Comparative. 438 human brains that I have studied it is possible to recognise every transitional stage in the disintegration of such characteristically pithe- coid types as are represented in Figures 1 and 3 and to identify in the maze of irregular sulci of most human brains the undoubted homologues of the occipital sulci of the Apes. In this note I wish especially to call attention to a means not only of checking the evidence of mere surface-anatomy but also of absolutely demonstrating the homology of the sulcus lunatus of the human brai
. Anatomischer Anzeiger. Anatomy, Comparative; Anatomy, Comparative. 438 human brains that I have studied it is possible to recognise every transitional stage in the disintegration of such characteristically pithe- coid types as are represented in Figures 1 and 3 and to identify in the maze of irregular sulci of most human brains the undoubted homologues of the occipital sulci of the Apes. In this note I wish especially to call attention to a means not only of checking the evidence of mere surface-anatomy but also of absolutely demonstrating the homology of the sulcus lunatus of the human brain with the "Affenspalte", This new criterion is afforded by the study of the distribution of the stria Gennari in the occipital cortex. This white line is so sharply defined in part of the occipital cortex in Man and the Apes that the stria-bearing region — or "area occ. trans. inc. par, occ. s. s. lunat s. lunat. s. ace. i. 1. s. 1. m. s. iufrastr. Fig. 3. The caudal aspects of the right cerebral hemisphere of a young Chim- panzee (Anthropopithecus troglodytes Schweinfurthi from tlie Niam-Niam Country) and the left cerebral hcmisi)herc of an adult male Egyptian. striata", as we may call it — can be mapped out in sections of the fresh brain with absolute exactness. The stria Gennari stops so ab- ruptly on all sides that its edges are plainly visible to the naked eye: it thus affords us a simple and sure means of identifying a definite area, which there is every reason for regarding as homologous in the brains of the various 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 Anatomische Gesellschaft. Jena : G. Fischer
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