CONTENTS. 
page 
PREFACE. 
BIBLIOGRAPHY . 1 
REVIEW OF LITERATURE . 3 
SYSTEMATIC PART . 9 
Classification . ' . 
Method of description and the material . 2 3 
Description of species .-. 2 5 
Supplement . 1 7 7 
ANATOMICAL PART . J 79 
Review of literature . I7 9 
Technical remarks . 
Microscopical-anatomical description . : ^4 
Review of microscopical anatomy . 2 3t? 
Generic differences . 2 4^ 
PHYLOGENETIC REMARKS . 2 47 
SYSTEMATIC INDEX . 2 5 2 
EXPLANATION OF THE PLATES. 
List of abbreviations. 
