78 



Ehyncliora, Dalman (pars). 



Bliynchura, Agassiz. 



Mhyncora, Gray. 

 Kraussina, Davidson. 



Krmissia, Davidson. 



Kraussinina, Paetel. 



(Megathyrince.) 



Megathyris, Bronn. 



MegatMris, D'Orbigny. 



Argyope, Deslongchamps, not Sa- 



viguy. 

 Argiope, Deslongchamps, not Sa- 

 vigny. 

 Cistella, Gray. 



Zellania, Moore. 



Fam. Thecidiidjs. 



Thecidium, Sowerby. 



Thecidea, Defrance. 



Thecidcea, Gray. 



Thecideum, Lacaze Duthiers. 



Fam. STRINGOCEPHALIDiE. 



Stringocephalus, Sandberger. 

 Strygocepliale, Blainville. 

 Sirygocephalus, Bronn. 

 Strigocephalus, Defrance. 



, Fam. Pentamekid^. 



Anastrophia, Hall. 



Brachymerus, Shaler. 

 Amphigenia, Hall. 

 Gypidula, Hall. 

 Pentamerella, Hall. 

 Camarella, Billings (pars). 



Camerella, Paetel. 

 Stenoschisma, n. 



Stenodsma, Conrad, not Hall. 



Cameroplioria, King. 



CamaropTioria, Bronn. 



Comeroplioria, Gray. 

 Pentamerus, Sowerby. 



Pentasiere, Blainville. 



Pentastera, Herrmannsen. 

 Conchidium, Linn6. 



Gypidia, Dalman. 



Gypidia, Hall. 



Gypidium, Beyricb. 

 Striclilandia, Billings. 



StricMandinia, Billings. 

 Syntrielasma, Meek. 



Syntrilasma, Carpenter. 



Fam. EH'xrcHONELLiD>aE. 



Ehyncbonella, Fiscber. 



Bhynchonelle, Fiscber. 



Bhyngonella, Bronn. 



* Oxyrhynchus, Llhwyd. 



Stenodsma. Hall, 1867. 

 Ebyncbotrema, Hall. 

 Hypotbyris, Phillips. 



Hypotliyris, King. 



Cyclothyris, Davidson. 



Blcornes, Quenstedt. 

 Acantbothyris, D'Orbigny. 



Acanthothiris, D'Orbigny. 

 Hemitbyris, Bronn. 



HemitMris, D'Orbigny. 



Hypothyris, Forbes & Hanley. 

 Ehyncbopora, King. 

 (?) Antirbyncbonella, Quenstedt. 

 Camarella, Billings (pars typ.). 



Camerella, Paetel. 

 Eatonia, Hall. 



Elonia, Meek & Hayden. 

 Dimerella, Zittel. 



Atretia, Jeffreys. 



Cryptopora, Jeffreys. 

 (?) Ebynchonellina, Gemellaro. 

 Triplesia, Hall. 



Dicraniscus, Meek. 

 Leiorbynchus, Hall, not End. 



Merisiella, Hall, gUj^,, 18(32. 

 ?Eicbwaldia, Billings. 



Dictyonella, Hall, MSS. 



Fam. Atrtpidje. 



Atrypa, Dalman. 



Spirigerina, D'Orbigny. 



Cleiothyris, Phillips. 



Cleidothyris, Paetel. 



CUothyris, Agassiz. 

 Anoplotheca, Sandberger. 

 Zygospira, Hall. 



Stenodsma, Hall, 1847, not Con. 

 (?) Coelospira, Hall. 



LeptocoeUa, Hall, 1857. 

 Koninckina, Suess. 



KonincMa, Woodward. 

 ? Davidsonia, Boncbard. 



Fam. Spiexfeeld^. 



Atbyris, M'Coy. 



Athyris, Davidson, 1856. 

 Seminula, M'Coy, 1844. 

 Actinoconchus, M'Coy. 

 fSemiluna, King. 



