CONTENTS. 



PAGE 



1. INTRODUCTION ..... 1 



2. GENERAL CONSIDERATIONS . 4 



3. ZOOLOGICAL CONSIDERATIONS . 8 



1. HISTORY . . 18 



5. NOMENCLATURE ... 23 



6. GEOLOGICAL AND GEOGRAPHICAL REMARKS . 27 



7. BIBLIOGRAPHY ... 51 



8. DESCRIPTION OF GENERA AND SPECIES . . 56 



9. DISTRIBUTION TABLES . .152 



S7435 



