212 



PARASITISM 



lioma spores of the fern lycopodium, which were probably introduced 

 with a face powder, were found. All such organisms, finding a favor- 



9 



IS 



Fig. 85 



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IB 



""Hi 





m>^ 



;iS^/-'*'T- 



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Types of the cell inclusions found in human cancer. (After Calkins.) 



