Trans. Am. Phil. Sc-C, N. S. XVIII, 1. 



PI 12 



20 



10 



AT/ 



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*-X$*fcJj 



rJHEJ <^ If 



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Spf 



HM <$~J) WA 



cN 



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s tf=^ gjfe 







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4 ^ <E§P1 





*SHK^^i=4 



15 



L. 2 arid 16 : Erasure of the scribe. 



