VI TABLE OF CONTENTS. 



Systematic consideration of the species — Continued. 



Family Siphonodentaliidae — Continued. Page. 



Genus Cadulus 95 



Key to the subgenera of Cadulus 95 



Subgenus Polyschides 96 



Key to the species of the subgenus Polysc hides 97 



Subgenus Platyschides 104 



Subgenus Gadila 130 



Subgenus Cadulus 141 



Explanation of plates 151 



Index 173 



