HACKBERRY STAGE OF THE UPPER DEVONIAN. 193 



Spirifer hungerfordi Hall 



vSpirifer n. sp. 

 ' Spirifer macbrideii Calvin 



Spirifer orestes H. & W. 



Spirifer substrigosus Webster 



Spirifer websten Fenton 



Spirifer cyrtinaformis H. & W. 



Spirifer cyrtinaformis helenae Fenton 



Cyrtina hamiltonensis recta Hall 



Ambocoelia sp. 



Reticularia n. sp. 



Athyris cf. minutissima Webster 

 Mollu'sca 

 Pelecypoda 



Grammysia sp. 



Spenotus contractus Hall(?) 



Leptodesma sp. 



Lucina sp.(?) 



Paracyclas sabini White 

 ' Paracyclas elliptica Hall 



Paracyclas validalinea Webster 



Glossites lingualis Hall 



Pterinopecten sps. 



Aviculopecten sps. 

 Gastropoda 



Bellerophon sp. 



Straparollus cyclostamus (Hall) 



Straparollus sp. 



Platyostoma(?) insolitum Webster 



Platyostoma(?) antiquum Webster 



Platyostoma(?) modestum Webster 



Diaphorostoma cf. ventricosum (Con.) 



Cyclonema sp.' 



Pleurotomaria verticillata Webster 



Holopea(?) iowensis Webster 



Holopea sps. 



Naticopsis gigantea H. & W. 



Naticopsis gigantea hackberryensis Webster 



Naticopsis gigantea websteri Fenton 



Naticopsis magnificentis Webster 



