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 



