The results of the serial section study of the representative animals are described under the headings: ventricles, hindbrain roof, meninges, ependyma, choroid plexuses, and CSF-vascular relationships, and reference is made to the selected microphotographs to illustrate salient features, following which there is both a diagrammatic presentation of the comparison of the CSF systems studied and a tabulation under the same six headings.
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