4 . CONTENTS 



e. The increase of the epiphysocerebral index during life in man.. 213 

 /. The resistance to the encroachment of the corpus callosum in 



mammals 216 



3. Evidence based on the histology of the epiphyseal complex 217 



4. The relation of the parietal eye to the pineal body 226 



5. The phylogenetic significance of the parietal eye with reference to 



vertebrate and invertebrate 233 



8. Summary and conclusions 238 



9. Bibliography 240 



