84 



Table showing approxima! ehj the hnmon disirihittion of the ckkf grovps of Brachopoda in 



geological time — Coutiuued. 



Camarella, Billings (bp.) 

 ArMstrophia, H.iU . . 

 Amplugenia, Hall . 

 Gypidula, Hall . . . 

 PgutaiP.erdla, Halh . . 

 Stcnoschisma, (Courad). 

 SuntriHasma, Meek. 



EllYSCHONELLIDA' . . 



? Eichwaldia, Cillings . 

 Eatonia, Hall. . . . 

 Tn'plesia, Hall. . 

 Antirhi/nchonel'a, Queiistedt 

 Camarella, Billings (pars) 

 Jihynclwnclla,, Fischer . . 

 Ijciorhynchiis, Hall, not Hud 

 Rhynchopora, King . 

 IJimerella, Zittel. . . 

 llhynchoncllina, Gemellarc 

 Aaanthothyrib; D'Orbigny 

 Hemithyris, Broun . . 



ATUYPIDjE 



Zygospira, Hall . . . 

 Coelospira, Hall . 

 Atrypn, Dalraan . 

 Anoplothcea, Sandberger 

 Davidsoiiia, Boncb . 

 / -ffonirtciiftft, Suosp. . 



.Sp(iiiferU)^ .... 



/ Skenidium, Hall . . 



Meristina, Hall (?> . . 



MerUtella, Hall, 18C1. . 



Merista, Suess. . . . 



Athyris, M'Coy . . . 



Spirifer, Sowerby. . . 



Cyrtia, Diiltnan , . . 



