160 



STUDIES IN EVOLUTION 



Basilicus Salter. 146 



Bathynotus Hall. 140 



Bathyurellus Billings. 146 



Batliyuriscus Meek. 146 



Bathyurus Billings. 146 



Bavaritta Barrande. 142 



Bergeronia Matthew. 142 



Boeckia Brogger. 142 



Bohemilla Barrande. 132 



Bolbocephalus Whitfield. 146 



Brachyaspis Salter. 146 



Bracliymetopus McCoy. 148 



Brongniartia Salter. 154 

 Bronteopsis W. Thompson. 146 



Bronteus Goldfuss. 149 



Bumastus Murchison. 146 



Burmeisteria Salter. 154 



Calymmene Brongniart. 154 



Calymmenella Bergeron. 154 

 Calymmenopsis Munier-Chal- 



mas and Bergeron. 154 



Carausia Hicks. 140 



Carman Barrande. 140 



Celmus Angelin. 148 



Centropleura Angelin. 142 



Ceratocephala Warder. 151 

 Ceralolichas Hall and 



Clarke. 150 



Ceratopyge Corda. 142 



Ceraurus Green. 155 



Chariocephalus Hall. 142 



Chasmops McCoy. 156 



Cheirurus Bey rich. 155 



Conocephalites Barrande. 140 



Conocoryphe Corda. 140 



Conolichas Dames. 150 



Conophrys Callaway. 133 



Cordania Clarke. 148 



Coronura Hall. 156 

 Corycephalus Hall and 



Clarke. 156 



Corynexochus Angelin. 142 



Page 



Crepicephalus Owen. 142 



Cromus Barrande. 153 



Crotalocephalus Salter. 155 



Crotalurus Volborth. 148 



Cryphceus Green. 156 



Cryptonymus Eichwald. 146 



Ctenocephalus Corda. 140 



Ctenopyge Linnarsson. 142 



Cybele Loven. 153 



Cyclognathus Linnarsson. 142 



Cyclopyge Corda. 146 



Cyphaspis Burmeister. 148 



Cyphoniscus Salter. 133 



Cyrtometopus Angelin. 155 



Dalmanites Emmrich. 156 



Dechenella Kayser. 148 



Deiphon Barrande. 155 

 Diaphanometopus Schmidt. 155 



Dicranogmus Corda. 150 



Dicranurus Conrad. 151 



Dictyocephalites Bergeron. 140 



Dikelocephalus Owen. 142 



Dindymene Corda. 153 



Dionide Barrande. 138 



Dipleura Green. 154 



Dolichometopus Angelin. 146 



Dorypyge Dames. 142 



Dysplanus Burmeister. 146 



Eccoptocheile Corda. 155 



Ectillcenus Salter. 146 



Ellipsoceplialus Zenker. 142 



Elliptocephala Emmons. 142 



Encrinurus Emmrich. 153 



Endymionia Billings. 138 



Erinnys Salter. 140 



Eryx Angelin. 140 



Euloma Angelin. 142 



Eurycare Angelin. 142 



Gerasaphes Clarke. 146 



Griffithides Portlock. 148 



Goldius de Koninck. 149 



Harpes Goldfuss. 137 



