SEPTUM, HIPPOCAMPUS, PALLIAL COMMISSURES 



439 



23 



J'ig. 24 Human embryo of 31 mm. Huber collection No. XLVII. Model of 

 the medial portion of the right half of the brain. For reference letters, see figure 

 8. The model was made from sagittal sections for the purpose of reconstructing 

 the median plane and the structures about the neuroporic recess. Not enough 

 sections were included in the model to give the complete boundary of the inter- 

 ventricular foramen. The recessus neuroporicus is between l.t. and l.s. The 

 blood vessels related to it are better drawn in figure 8. Note the well-marked 

 sulcus hypothalamicus which crosses the sulcus limitans of His to form the sul- 

 cus Monroi. 



