FIGURE 6 



Section of head of 20 mm. human embryo, 

 and through occipital vertebra. 



1, Tip of paracondyloid process 8, 



2, Lateral masses of occipital verte- 9, 



bra 



3, Anterior arch of occipital vertebra 10, 



4, Chorda dorsalis H, 



5, Dens epistrophei 12, 



6, Neural arc h of atlas 13, 



7, Ala hypoc hiasmatica H, 



passing through lower part of eye 



Processus alaris of ala temporalis 

 Processus ascendens of ala tempor- 

 alis 

 Foramen rotundum 

 Nervusopticus 

 Nervusfacialis 

 Chorda tympani 

 Cavum tympani 



638 



