LINN^US AND THE LINNEAN CLASSIFICATION. 63 



natural history, there are indications that it may be 

 necessary to give a further expansion to the Linnean 

 nomenclature, and to adopt a ' trinomial ' system, to 

 indicate differences which are slightly below what are 

 usually recognised as ' specific ' differences. Even, how- 

 ever, in the case of the general adoption of this modifica- 

 tion, the boon conferred upon naturalists by the Linnean 

 system of nomenclature would remain simply beyond 

 calculation. 



