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The vena cerehraUs posterior arises from the vena capatis lateralis more 

 dorsalwards, at its juncture with the vena jugularis interna, and encircles 

 the hind-brain in the region of the twelfth nerve. These two veins are 

 well shown in Figs. 9 and 13. 



Fig. 16. 



Fig. 16. Diagram of the veins of the head at the beginning- of the third month. Letter- 

 ing as before. 



Fig. 17. 



Fig. 17. Diagram of the veins of tho brain of an older foetus. Lettering as before. LS, 

 transverse sinus; SR, sinus rectus; ILS, inferior sagittal sinus; FG, great cerebral vein 

 (Galen); CS, cavernous sinus; SS, middle cerebral vein (Sylvian); SPS, spheno-parietal 

 sinus ; Sup. Pel., superior petrosal ; Inf. Pet., inferior petrosal sinus. 



