1410 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Class GRAPTOLITOIDEA. 



Order Dendroidea. 



Family Dendrograptid.<e Roemer. 



Acanthograptus Spencer, Cactograptus Rnedemann, Callograptus Hall, Calyptograptus 

 Spencer, Cyclograptus Spencer, Desmograptus Hopkinson, Dendrograptns Hall, 

 Dictyonema Hall, Inocaulis Hall, Mastlgograptus Rnedemann, Odontocaulis Lap- 

 worth, Palseodictyota Whitfield, Ptilograptus Hall, Rhizograptus Spencer, Thamno- 

 graptns Hall. 



POSITION UNCERTAIN. 



Chaunograptns Hall, Corynoides Nicholson, Protovlrgularia McCoy. 



Order Graptoloidea. 



Suborder Axonolipa. 



Family Dichograptid>e Lapworth. 



Azygograptus Nicholson, Bryograptus Lapworth, Clonograptus Hall, Dichograptus 

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

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



Family Leptograptid.^ Lapworth. 



Amphigraptus Lapworth, Leptograptus Lapworth, Nemagraptus Emmons, Pleuro- 

 graptus Nicholson, Sigmagraptus Rnedemann, Syndyograptus Ruedemann. 



Family Dicellograptid^e Lapworth. 



Dicellograptus Hopkinson, Dicranograptus Hall. 



Suborder Axonophora. 



Family Diplograptid^e Lapworth. 



Climacograptus Hall, Cryptograptus Lapworth, Diplograptua McCoy, Glyptograptus 

 Lapworth, Orthograptus Lapworth, Trigonograptus Nicholson. 



Family Glossograptid,e Lapworth. 



Glossograptns Emmons, Lasiograptus Lapworth, Retiograptns Hall. 



Family Retiolitid^e Lapworth. 

 Retiolites Barrande. 



Family Dimorphograptid^e Lapworth. 

 Dimorphograptus Lapworth. 



Family Monograptid^e Lapworth. 

 Cyrtograptus Carrnthers, Monograptus Geinitz, Rastrites Barrande. 



TOSITION UNCERTAIN. 



Dawsonia Nicholson, Strophograptns Rnedemann. 



Phyllum VERMES. 

 Order Miskoa. 



Eopolycluetus Ruedeman, Eotrophonia Ulrich, Pontobdellopsis Rnedeman, Pro- 

 toscolex Ulrich. 



Order Errantia. 



Arabellites Hinde, Eunicites Ehlers, Glycerites Hinde, Lnmbriconerites Ehlers, 

 Nereid avus Grinnel, (Enonites Hinde, Staurocephalites Hinde. 



