CONTENTS. 



Page 



Preface iii 



I. Habits and Faculties 1 



II. Geographical Distribution 17 



III. Jaw and Lingual Membrane 41 



IV. Special Anatomy 53 



V. Classification 76 



VI. Systematic Index 77 



VII. Descriptions 80 



VIII. Supplement . 432 



IX. Index 433 



X. Explanation of Plates of Vol. Ill 441 



XI. Explanation of Plates of Vol. V. . . 445 



