DEVELOPMENT OF THE CHOROID PLEXUS 119 



th.,p.5. 



vl.pa 



Fig. 26 Lateral view of a model tif the region around the foramen inter- 

 ventriculare from the 32 mm. embryo, H 41. X 50. Median view of the same 

 model is shown in figure 2o. For help in orientation, the approximate position of 

 the roof i^hitc, which lies on the opposite side of the hemisphere wall, has been 

 projected through as a dotted line. The location of the taenia thalami is indi- 

 cated by a row of dots and dashes. An arrow lies in the di-telencephalie groove 

 and continues across in the groove of the velum transversum. The position of 

 its head may be seen by referenceto figure 25. .Vnterior end of model totheright. 



