CONTENTS xi 



Superfamily Dalmancllacea — Cont. Page 



Family Schlzophoriid.-c 139 



Subfamily Schizophoriinae 140 



P'tonodema 141 



Schizophoria 143 



Orthot'tch'ta 144 



Aulacofhoria 145 



Subfamily Enteletinx 145 



Enteletei 146 



Parenteletes 147 



Enieletina 148 



Enteletella 148 



Enteletoides 148 



Subfamily Isorthinae 149 



Isorthis 149 



Family Linoporellidx 150 



Ltnoporella 150 



Orthotrofta 152 



Family Tropidoleptidae, nov 152 



Tropidoleftus 152 



Part V. The genera of the suborder Pentameroidea 154 



Superfamily Syntrophiacea 154 



Family Clarkellids 155 



Syntrofh'to'uies 155 



Syntrofhina 155 



Clarkella 156 



Yangtzeella 157 



Family Syntrophiids 158 



Syntrofhta 158 



Swantonia 159 



Family Huenellidae 159 



Huenella 159 



Huenellina 160 



Superfamily Pentameracea 161 



Technique 162 



Morphology of the Pentameracea 162 



Exterior 162 



Ventricosity 162 



Ornamentation 162 



Interareas 163 



Ventral interior 163 



Delthyrium 163 



Deltidial cover 163 



Deltidial plates 163 



Spondylium 164 



Dorsal interior 164 



Septa 164 



Musculature 164 



Cardinalia 164 



