PLATE I 



1234 



678 9 10 



11 12 13 14 15 16 17 18 19 20 



12 34 56 78 9 10 11 



12 13 14 15 16 17 18 19 20 21 22 



(Reprinted from Journal of Ilii'iinn , !'/. 111. \ -') 



