79 



Cleiothyris, King. 

 Spirigera, D'Orbigny. 

 Eiiihijris, Quenstedt. 

 (?) Charionella, Billings. 

 Merista, Suess. 



Camarium, Hall. 

 Pentagonia, Cozzens. 



Goniocoelia, Hall. 

 Meristella, Hall, 1861. 



Athyris, Davidson, 1853. 

 Athyris, Billings. 

 (?) Meristina, Hall. 

 Nucleospira, Hall. 

 Eetzia, King. 



Betsia, Davidson. 

 Bhynchosjnra, Hall. 

 Bhyncosjnra, Hall. 

 Trematospira, Hall. 

 Acambona, White. 



Eumetria, Hall. 

 Uncites, Defrance. 



Uncinites, auctt. 

 Spirifer, Sowerby. 



Spirifera, J. de C. Sowerby. 

 Spiriferus, Blainville. 

 Spinifer, Rafinesque. 

 HysteroUthus, Quenstedt. 

 Fusella, M'Coy.^ 

 Clioristites, Fischer. 

 Chorisiites, Quenstedt. 

 Choristides, Kefersteiu. 

 Delthyris, Dalraan. 

 Brachythyris, M'Coy. 

 Trigonotreta, Konig, Meek. 

 Trigonotetra, Keferstein. 

 Eeticidaria, M'Coy. 

 Martinia, M'Coy. 



Anibocoelia, Hall. 

 Amiocoilia, Quenstedt. 

 Syringotbyris, Winchell. 



Spirifer, King, Meek. 

 Cyrtia, Dalman. 



Cyrthia, D'Orbigny, 

 Cyrtina, Davidson. 



Cyrtaena, Hall. 

 (?)Mentzelia, Quenstedt. 

 Suessia, Deslongcbamps. 

 Spiriferina, D'Orbigny. 

 # # 



(?) Skenidiuin, Hall. 



Fam. PORAMBONITID^. 



Porambonites, Pander. 



Friamionites, Agassiz. 

 Isorhynchus, King. 



Fam. Strophomened^. 



Stropbomena, Blainville. 



Hemipronites, Meek. 



Strophonema, Rang. 



OrtUs, King, 1850. 



Leptaena, sp. Dalman. 



Strophomena, Davidson (pars). 

 Hipparionyx, Vanuxem. 



(?) Ortholheten, Fischer, 1837. 



OrthoUietes, Fischer, 1850. 



Orthoiheles, D'Orbigny. 



Ortliotetes, Oken. 



Streptorhyuchus, King. 

 (?) Plectambonites, Pander. 



Leptaena, sp. Dalman. 



Leptaena, King, 1846. 



Strophomena, Meek, 1873. 



Leptagonia, M'Coy. 



Leptogonia, Agassiz. 

 Leptaena, Dalman (pars). 



Leptaena, Davidson. 



Plectamhonites, King. 



Stropheodonta, Hall. 



Strophodonta, Hall. 



Strepheodonta, Marschall. 

 Klitambonites, Pander. 



Pronites, Pander, not Illiger. 



Prionites, Agassiz. 



Clifamhonites, Agassiz. 



Hemipronites, Pander. 



Hemiprionites, Agassiz. 



Gonanihonites, Pander. 



OrtUdna, D'Orbigny. 



Orthisina, Davidson. 



Orthie, Davidson. 



Orthis, Dalman (pars). 



Orthambonites, Pander. 



Strophomenes, Steininger. 



Scliizoplioria, King. 



Platystropbia, King. 



PlaiistropMa, Quenstedt. 

 (?) Meekella, White & St. JoTin. 



Bilobites, Linn6. 



Dicaelosia, King. 

 Bracbyprion, Shaler. 



(Doubtful.) 

 ? Ampbiclina, Laube. 

 ? Aulacorbynchus, Dittmar. 

 ? Euteletes, Fischer. 



Entellites, Sowerby. 



Antcletes, D'Orbigny. 

 ? Iphidea, Billings. 

 ? Tropidoleptus, Hall. 

 ? Skenidium, Hall. 



