xii CONTENTS. 



CHAI\ PAGE 



\ . PHYSIOLOGICAL INTEGRATION IN PLANTS .... 292 

 VI. DIFFERENTIATIONS BETWEEN THE OUTER AND INNER TISSUES 



OF ANIMALS 209 



VII. DIFFERENTIATIONS AMONG THE OUTER TISSUES OF ANIMALS . 309 



VIII. DIFFERENTIATIONS AMONG THE INNER TISSUES OF ANIMALS . 323 



IX. PHYSIOLOGICAL INTEGRATION IN ANIMALS .... 373 



X. SUMMARY OF PHYSIOLOGICAL DEVELOPMENT .... 384 



X A . THE INTEGRATION OF THE ORGANIC WORLD .... 390 



PART VI. LAWS OF MULTIPLICATION. 



I. THE FACTORS 411 



II. A PRIORI PRINCIPLE 417 



III. OBVERSE A PRIORI PRINCIPLE 424 



IV. DIFFICULTIES OF INDUCTIVE VERIFICATION .... 432 



V. ANTAGONISM BETWEEN GROWTH AND ASEXUAL GENESIS . 439 



VI. ANTAGONISM BETWEEN GROWTH AND SEXUAL GENESIS . . 448 



VII. THE ANTAGONISM BETWEEN DEVELOPMENT AND GENESIS, 



ASEXUAL AND SEXUAL 461 



VIII. ANTAGONISM BETWEEN EXPENDITURE AND GENESIS . . 407 



IX. COINCIDENCE BETWEEN HIGH NUTRITION AND GENESIS . . 475 



X. SPECIALITIES OF THESE RELATIONS 486 



XI. INTERPRETATION AND QUALIFICATION 497 



XII. MULTIPLICATION OF THE HUMAN RACE 506 



XIII. HUMAN POPULATION IN THE FUTURE 522 



APPENDICES. 



A. SUBSTITUTION OF AXIAL FOR FOLIAR ORGANS IN PLANTS . . 541 

 B, A CRITICISM ON PROF. OWEN S THEORY OF THE VERTEBRATE 



SKELETON 548 



C. ON CIRCULATION AND THE FORMATION OF WOOD IN PLANTS . . 507 



1). ON THE ORIGIN OF THE VERTEBRATE TYPE 599 



D. THE ANNULOSE TYPE 602 



E. THE SHAPES AND ARRANGEMENTS OF FLOWERS .... 608 



F. PHYSIOLOGICAL (OR CONSTITUTIONAL) UNITS .... 612 



G. TlIE INHERITANCE OF FUNCTIONALLY-CAUSED MODIFICATIONS , 618 



