Fig. 7 Cross section of the same embryo through the anterior part of the otic 

 region in front of the previous figure, showing the nervus abducens immediately 

 before it enters the foramen abducentis and also the processus basipterygoideus 

 (pr.fe.). X 15. 



Fig. 8 Cross section of the same embryo through the posterior part of the orbito- 

 temporal region, showing the large ganglion semilunare (g.s.) lying in the fenes- 

 tra prootica; the nervus abducens {VI) is seen on the right side lying in the fora- 

 men abducentis and on the left it is ventral to the base of the pila prootica (p.p.). 

 The cartilage articularis (c.a.) is to be seen attached to the ventral surface of the 

 processus basipterygoideus. X 15. 



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