160 



STUDIES IN EVOLUTION 



Basilicus Salter. 

 Bathynotus Hall. 

 Bathyurellus Billings. 

 Bathyuriscus Meek. 

 Bathyurus Billings. 

 Bavarilla Barraude. 

 Bergeronia Matthew. 

 Boeckia Brogger. 

 Bohemilla Barrande. 

 Bolbocephalus Whitfield. 

 Brachyaspis Salter. 

 Brachymetopus McCoy. 

 Brongniartia Salter. 

 Bronteopsis W. Thompson. 

 Bronteus Goldfuss. 

 Bumastus Murchison. 

 Burmeisteria Salter. 

 Calymmene Brongniart. 

 Calymmenella Bergeron. 

 Calymmenopsis Munier-Chal- 



mas and Bergeron. 

 Caransia Hicks. 

 Carmon Barrande. 

 Celmus Angelin. 

 Centropleura Angelin. 

 CeratocepJiala Warder. 

 Ceratolichas Hall and 



Clarke. 

 Ceratopyge Corda. 

 Ceraurus Green. 

 Chariocephalus Hall. 

 Chasmops McCoy. 

 Cheirurus Beyrich. 

 Conocejyhalites Barrande. 

 ConocorypJie Corda. 

 Conolichas Dames. 

 Conophrys Callaway. 

 Cordania Clarke. 

 Coronura Hall. 

 Corycephalus Hall and 



Clarke. 

 Corynexochus Angelin. 



