I ^ . 



PLATE 



12 3 4 5 C, 7 8 ;i 10 



''.'/,'. 



12 3 4 5 6 7 8 'J lU 11 



12 13 14 In 16 17 18 19 2U 21 22 



Fig. 5- 



(Repriuted from Journal of Il[/()ic)n', I'o/. IIJ. No 2) 



