XII TABLE OF CONTENTS. 



Systematic list— Continued. 



Class Pelecypoda — Continued. 



Order Teleodesmacea — Continued. Page. 



Family Semelidae 206 



Genus Semele 206 



Genus Abra 206 



Genus Theora 206 



Family Psammobiidae 207 



Genus Gastrana 207 



Genus Psammobia 207 



Genus Psammotellina 207 



Family Donacidae .' 207 



Genus Donax 207 



Family Solenidae 208 



Genus Solen 208 



Family Mactridae 208 



Genus Schizodesma 208 



Genus Eastonia 209 



Genus Mactra 209 



Genus Lutraria 210 



Family Saxicavidae 210 



Genus Saxicava 210 



Family Gastrocbaenidae 210 



Genus Gastrocbaena 210 



Family Pboladidae 210 



Genus Pholas 210 



Bibliograpby 211 



List of species collected by Colonel Turton 221 



South African mollusks not in the U. S. National Museum 229 



Explanation of plates 257 



Index 269 



