78 



RLynchora, Dalman (pars). 



lihynclwra, Agassiz. 



Ehyncora, Gray. 

 Kraussina, Davidson. 



Kraussia, Davidson. 



Kraussinina, Paetel. 



{Megathyrince. ) 



Megathyris, Broun. 



Megatliiris, D'Orbigny. 



Argijope, Deslongchamps, not Sa- 



Argiope, Deslongchamps, not Sa- 

 vigny. 

 Cistella, Gra5^ 



Zcllania, Moore. 



Fam. Thecidiid^. 



Thecidinm, Sowerby. 



Thecidea, Defrance. 



Theddcca, Gray. 



Theckleum, Lacaze Duthiera. 



Fam. SXRINGOCEPHALIDiE. 



Stringocephalus, Sandberger. 

 Strygocephale, Blainville. 

 Sirygoecphalus, Bronn. 

 Strigocephalus, Defrance. 



Fam. PENTAMEBIDiE. 



Anastrophia, Hall. 



Brachymerns, Shaler. 

 Amphigeuia, Hall. 

 Gypidnla, Hall. 

 Pentamerella, Hall. 

 Camarella, Billings (pars). 



CamereUa, Paetel. 

 Steuoscbisnia, n. 



Stenodsma, Conrad, not Hall. 



Cameroplioria, King. 



Camaroplxoria , Bronn. 



Comerophoria, Gray. 

 Pentamerus, Sowerby. 



Pentasiere, Blainville. 



Pentastera, Herrmannsen. 

 Conchidium, Linu^. 



GypkVui, Dalman. 



Gypldia, Hall. 



Gypidium, Bayrich. 

 Stricklandia, Billings. 



Stricklandima, Billings. 

 Syutrielasma, Meek. 



iSi/ntrilas7na, Carpenter. 



Fam. Rh'Sitchonellid^. 



Rhyncbonella, Fischer. 



Phynchonelle, Fischer. 



Bhyngonella, Bronn. 



* Oxyrhynchus, Llhwyd. 



Stenodsma, Hall, 1867. 

 Rhynchotrema, Hall. 

 Hypothyris, Phillips. 



Uypothyris, King. 



Cydothyris, Davidson. 



Bicornes, Quenstedt. 

 Acanthothyris, D'Orbigny. 



Acanthothiris, D'Orbigny. 

 Hemithyris, Bronn. 



Semithiris, D'Orbigny. 



Hypothyris] Forbes & Hanley. 

 Rhynchopora, King. 

 (?) Autirhynchonella, Quenstedt. 

 Camarella, Billings (pars typ.). 



Camerella, Paetel. 

 Eatonia, Hall. 



Elonia, Meek & Hayden. 

 Dimerella, Zittel. 



Atretia, Jeffreys. 



Cryptopora, Jeffreys. 

 (?)Rhynchonellina, Gemellaro. 

 Triplegia, Hall. 



Dicraniscus, Meek. 

 Leiorhynchus, Hall, not Rud. 



Merisiella, Hall, oluiv. 1862. 

 ?Eichwaldia, Billings. 



Dictyonella, Hall, MSS. 



Fam. Atrypld^. , 



Atrypa, Dalman. 



Spirigerina, D'Orbigny. 



Cldothyris, Phillips. 



Cleidofhyris, Paetel. 



Cliothyris, Agas&iz. 

 Anoplotheca, Sandberger. 

 Zygospira, Hall. 



Stenodsma, Hall, 1847, not Con. 

 (?) Coelospira, Hall. 



LeptocoeUa, Hall, 1857. 

 Koninckiua, Suess. 



Koninckia, Woodward. 

 ? Davidsonia, Bouchard. 



Fam. Spieipebid^. 



Athyris, M'Coy. 



Athyrig, Davidson, 1856. 

 Sembuaa, M'Coy, 1844. 

 Actinocondms, M'Coy. 

 Semiluna^ King. 



