Journal of Microscop3^,Yol 4,P1. 20 



2, '.^.-.-^^s^ffi^^^^ 



X 100 



4 









5 





^- l?i#fei|Jv^^^ ; ::ii?^^ 



■-^-^■^ 







4^:^11 ^A 



it 



6 .^- 



-TTini 



w-^-^. 









s... 



-■-■■qL 





fSl^V7Z'(^ of WoyS/ly, ScO 



