CONTENTS 



CHAP. PAGE 



PREFACE vii 



I. THE ART OF MORPHOLOGY, BEING A DISCOURSE 



UPON ORGANIC FORM I 



II. PHYSIOLOGICAL CLASSIFICATION 13 



III. EXPOSED AND CONCEALED ANIMALS (PHANEROZOA 



AND CRYPTOZOA) 23 



IV. FREE AND FIXED ANIMALS (ELEUTHEROZOA AND 



STATOZOA) 35 



V. MIMICRY AND HOMOPLASY $2 



VI. DIVERGENCE AND PARALLELISM 69 



VII. SPECIAL CONVERGENCE 87 



VIII. HABITUDES AND ATTITUDES (BIONOMICAL CON- 

 VERGENCE) 113 



IX. THE WAYS OF BREATHING (RESPIRATORY CON- 

 VERGENCE) 138 



X. CONVERGENCE IN MINUTE STRUCTURE (HISTO- 



GENETIC CONVERGENCE) 153 



INDEX 173 



111 



