No Naturalist Has Devoted More

The Laws Of Coexistence;-the Adaptation Of Structure To Function; And To A Certain Extent The Elucidation Of Natural Affinities May Be Legitimately Founded Upon The Examination Of Fully Developed Species;-but To Obtain An Insight Into The Laws Of Development,-the Signification Or Bedeutung, Of The Parts Of An Animal Body Demands A Patient Examination Of The Successive Stages Of Their Development, In Every Group Of Animals.

Mr. Darwin Refers To The Multitude Of The Individual Of Every Species, Which, From One Cause Or Another, Perish Either Before, Or Soon After Attaining Maturity.

Cuvier Had Preceded Lamarck In Specifying The Kinds And Degrees Of Variation, Which His Own Observations And Critical Judgment Of The Reports Of Others Led Him To Admit.

The Powers, Aspirations, And Mission Of Man Are Such As To Raise The Study Of His Origin And Nature, Inevitably And By The Very Necessity Of The Case, From The Mere Physiological To The Psychological Stage Of Scientific Operations.

Homologue. The Same Organ In Different Animals Under Every Variety Of Form And Function.