TABLE OF CONTENTS. 



Page. 



Introduction 1 



Descriptions of skulls and skeletons of Ziphioid whales 3 



Genus llesoplodou 3 



Mesoplodon bidens 4 



densirostris 9 



europteus 11 



stejnegeri 24 



Genus Ziphius 30 



Ziphius cavirostris 30 



Genus Berardius 60 



Berardius bairdii 60 



Genus Hy peroodon 76 



Hyperoodon ampullatus 76 



List of species of existing Ziphioid whales 76 



Index 79 



Explanation of plates 83 



V 



