INDEX. 243 



PAGE. 



Spirifera rostellum " 129 



sculptilis 132 



segmenta 132 



varicosa 134 



Streptorhynchus arctostriata 140 



subplanus 141 



tenuis . _ . . 142 



Stricklandinia louisvillensis 65 



Strophodonta demissa 143 



hemispherica 144 



inequistriata 145 



nacrea .., 146 



perplana 147 



plicata 149 



profunda . 148 



striata 149 



Strophomena rhoraboidalis (Devonian) 150 



rhomboidalis (Silurian) 151 



Terebratula harmonia 154 



jucunda. 154 



lincklaeni 155 



roemigeri - - 155 



Trematospira hirsuta 136 



helena 137 



Tropidoleptus carinatus 46 



Zygospira kentuckiensis . 138 



PTEROPODA, 



Styliola fi ssurella - 157 



Tentaculites scaliformis . 156 



GASTEROPODA. 



Bellerophon leda -- 158 



Bucania devonica . 160 



Callonema bellatula 175 



clarki - 175 



imitator . 176 



