114 THE ACTINOMYCETES, Vol. II 



certain other distinct properties, such as raising of the latter to a series status. In 



pigmentation, morphology, and carbon utili- other cases, however, the mere formation of 



/at ion, to justify the creation of new species. a different antibiotic without other accom- 



This has actually been done for the separa- parrying differences hardly justifies, for the 



tion of S. griseinus from S. griseus and the present at least, the creation of new species. 



