TABLE OF CONTENTS.

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Frederick W. True
Page.
Introduction 1
Descriptions of skulls and skeletons of Ziphioid whales 3
Genus Mesoplodon 3
Mesoplodon bidens 4
densirostris 9
europÆus 11
stejnegeri 24
Genus Ziphius 30
Ziphius cavirostris 30
Genus Berardius 60
Berardius bairdii 60
Genus HyperoÖdon 76
HyperoÖdon ampullatus 76
List of species of existing Ziphioid whales 76
Index 79
Explanation of plates 83

AN ACCOUNT OF THE BEAKED WHALES OF THE FAMILY ZIPHIIDÆ IN THE COLLECTION OF THE UNITED STATES NATIONAL MUSEUM, WITH REMARKS ON SOME SPECIMENS IN OTHER AMERICAN MUSEUMS.

By Frederick W. True,
Head Curator, Department of Biology, U. S. National Museum.

                                                                                                                                                                                                                                                                                                           

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