79 



Cleiothyris, King, 



Spirigera, D'Orbigny. 



Eutliyrls, Quenstedt. 

 (?) Chariouella, Billiugs. 

 Merista, Suess. 



Camarium, Hall. 

 Pentagouia, Cozzens. 



GoniocoeUa, Hall. 

 Meristella, Hall, 1861. 



Athyris, Davidson, 1853. 



Athyris, Billings. 

 (?) Meristina, Hall. 

 Nucleospira, Hall. 

 Retzia, King. 



Befsia, Davidson. 



Hhynchosjnra, Hall. 



Bhyncosjnra, Hall. 



Treuiatospira, Hall. 

 Acambona, White. 



Eumetria, Hall. 

 Uncites, Defiance. 



Uncinitcs, anctt. 

 Spirifer, Sowerby. 



Spirifira, J. de C. Sowerby. 



Sjnriferus, Blainville. 



Sjnnifer, Rafinesque. 



HysteroUthus, Quenstedt. 



Ftisella, M'Coy. 



Choristites, Fischer. 



Chorislites, Quenstedt. 



Chorisfides, Keferstein. 



Delthyris, Dalman. 



Brachythyris, M'Coy. 



Trigonotrtta, Konig, Meek. 



TrigonoMra, Keferstein. 



Beticiilaria, M'Coy. 

 Martinia, M'Coy. 



Ambocoelia, Hall. 



Amhocoilia, Quenstedt, 

 Syrlngothyris, Winchell. 



Spiriftr, King, Meek. 

 Cyrtia, Dahnan. 



Cyrthla, D'Orbignj^ 

 Cyrtina, Davidson. 



Cyrtaena, Hall. 

 (?)Mentzelia, Quenstedt. 

 Suessia, Deslougchamps. 

 Spiriferina, D'Orbigny. 

 » » 



(?)SkcnidiuuD, Hall. 



Fam. PoRAMBOsriTiD^, 

 Porambonites, Pander. 



Priambonites, Agassiz. 



Isorhynehus, King. 



Fam. Strophomenid^. 

 Strophomena, Blainville. 



Hemipronites, Meek. 



Strophoncma, Rang. 



Orthis, King, 1850. 



IjCptaena, sp. Dalman. 



Strophomena, Davidson (pars). 

 Hipparionys, Vanuxem. 



(?) Ortholhetes, Fischer, 1837. 



Orlhothctes, Fischer, 1850. 



Orthoiheles, D'Orbigny. 



Orthofctrs, Oken. 



Streptorhynchus, King. 

 (?) Plectanibonites, Pander. 



Lepiaena, sp. Dalman. 



Leplaena, King, 1846. 



Strophomena, Meek, 1873. 



Ltptagonia, M'Coy. 



Leplogonia, Agassiz. 

 Leptaena, Dalman (pars). 



Leptaena, Davidson. 



Plectamhonifes, King. 

 Stropbeodonta, Hall. 



Strophodonta, Hall. 



Strepheodonta, Marschall. 

 Klitambonites, Pander. 



Provites, Pander, not Illiger. 



Prionites, Agassiz. 



Clitamhonites, Agassiz. 



nemipronUcs, Pander. 



Hemiprionites, Agassiz. 



GonawhonUes, Pander. 



Orthhina, D'Orbigny. 



Orth'mna, Davidson. 



Ortbi?, Davidson. 



Orthis, Dalman (pars). 



Orthambonites, Pander. 



Strophomenes, Steininger. 



Schizophoria, King. 



Platystrophia, King. 



Platistrophia, Quenstedt. 

 (?) Meekella, White & St. John. 



Bilobites, Linn<S. 



Dicaelosia, King. 

 Bracbyprion, Shaler. 



(Doubtful.) 

 ? Amphiclina, Laube. 

 ? Aulacorbynchus, Dittmar. 

 ? Enteletes, Fischer. 



Entellitcs, Sowerby. 



Anieletes, D'Orbigny. 

 ? Ipbidea, Billings. 

 ? Tropidoleptus, Hall. 

 ? Skeuidium, Hall. 



