1410 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Class GRAPTOLITOIDEA. 



Order DENDROIDEA. 



Family DENDROGRAPTID^ Roemer. 



Acanthograptus Spencer, Cactograptus Ruedemann, Callograptus Hall, Calyptograptus 

 Spencer, Cyclograptus Spencer, Desmograptus Hopkinson, Dendrograptus Hall, 

 Dictyonema Hall, Inocaulis Hall, Mastigograptus Ruedemann, Odontocaulis Lap- 

 worth, Palaeodicty ota Whitfield, Ptilograptus Hall, Rhizograptus Spencer, Thamno- 

 graptus Hall. 



POSITION UNCERTAIN. 



Chaunograptus Hall, Corynoides Nicholson, Protovirgularia McCoy. 



Order GRAPTOLOIDEA. 



Suborder AXONOLIPA. 



Family DICHOGRAPTID^: Lapworth. 



Azygograptus Nicholson, Bryograptus Lapworth, Clonograptus Hall, Dichograptus 

 Salter, Didymograptus McCoy, Goniograptus McCoy, Loganograptus Hall, Phyllo- 

 graptus Hall, Staurograptus Emmons, Temnograptus Nicholson, Tetragraptus Salter. 



Family LEPTOGRAPTID^E Lapworth. 



Amphigraptus Lapworth, Leptograptus Lapworth, Nemagraptus Emmons, Pleuro- 

 graptus Nicholson, Sigmagraptus Ruedemann, Syndyograptus Ruedemann. 



Family DICELLOGRAPTID^E Lapworth. 

 Dicellograptus Hopkinson, Dicranograptus Hall. 



Suborder AXONOPHORA. 



Family DIPLOGRAPTID^E Lapworth. 



Climacograptus Hall, Cryptograptus Lapworth, Diplograptus McCoy, Glyptograptus 

 Lapworth, Orthograptus Lapworth, Trigonograptus Nicholson. 



Family GLOSSOGRAPTID^ Lapworth. 

 Glossograptus Emmons, Lasiograptus Lapworth, Retiograptus Hall. 



Family RETIOLITID^E Lapworth. 

 Retiolites Barrande. 



Family DIMORPHOGRAPTID^ Lapworth. 

 Dimorphograptus Lapworth. 



Family MONOGRAPTID.^E Lapworth. 

 Cyrtograptus Carruthers, Monograptus Geinitz, Rastrites Barrande. 



POSITION UNCERTAIN. 



Dawsonia Nicholson, Strophograptus Ruedemann. 



Phyllum VERMES. 

 Order MISKOA. 



Eopolychaetus Ruedeman, Eotrophonia Ulrich, Pontobdellopsis Ruedeman, Pro- 

 toscolex Uhich. 



Order ERRANTIA. 



Arabellites Hinde, Eunicites Ehlers, Glycerites Hinde, Lumbriconerites Ehlers, 

 Nereid avus Grinnel, (Enonites Hinde, Staurocephalites Hinde. 



