Yes, It Is True That There Are

The Best Opinion Now Is, That There Are Multitudinous Forms Which Are Not Sufficiently Differentiated To Be Distinctively Either Plant Or Animal, While, As Respects Ordinary Plants And Animals, The Difficulty Of Laying Down A Definition Has Become Far Greater Than Ever Before.

This View, As A Rounded Whole And In All Its Essential Elements, Has Very Recently Disappeared From Science. It Died A Royal Death With Agassiz.

I Accept Extinction As Best Explaining Disjoined Species. I See That The Same Cause Must Have Reduced Many Species Of Great Range To Small, And That It May Have Reduced Large Genera To So Small, And Of Families.

In Short, The Animal And Vegetable Lines, Diverging Widely Above, Join Below In A Loop.

It Was Implicitly Supposed That Every Living Thing Was Distinctively Plant Or Animal; That There Were Real And Profound Differences Between The Two, If Only They Could Be Seized.