Fl^. 1. 



Fip.4-. 



<%. 



Fig. 2. 



im^' 



Fiff. 3. 



F^.S. 



Fiff.S. 



^^ 



Fig. -to. 



J^iff-g- 





Fig. 11. 



Fig.i2. 



\ — ■' 



Ful. 13. 



W 



