122 



SYNOPSIS OF AMEHICAN FOSSIL BRAOHIOPODA. 



[lU-Li,. 87. 



Orthoihyiicluilii Ihill and Clarke, 



ISO.?. 

 Kliyiu'liotienia I lull, 1860. 



Stcuochisiiiiil'oiirad, 1839; Hull, 18(57. 

 Ehyuchotreta Hall, 1879. 

 Cauiarotiecliia llall aud (3larke, 

 1803. 

 riethorhynchiis Hall and Clarke, 

 1893. 

 Leioihynchus llall, 1800. 

 Wilsouia Kayser, 1871. 



T'nciiinlin.a Bayle, 1878. 

 Uiicinulufs Bayle, 1878. 

 Hypolhyri-s King, 1840 (not Phil- 

 lips, 1841). 

 Piigiiax llall and Clarke, 1893. 

 Eatonia Hall, 1857. 

 Cyclorliiua Hall aud Clarke, 1893. 

 Khyebopora King, 1856. 



Rbyiicho2)oriua Qilhlert, 1887. 



Terebratnl()i(l<'a Waagen, 18s;!. 

 Kbynclionella Mslierde Waldheim, 

 1800. 



Oxyrbyucbus l^lbwyd, 1699 (not Aris- 

 totle). 



Kliyujjonella Bronn, 1849. 



Bicornes Queustcdt, 18."1. 



Rbynobonellopsis Bose, 1891. 

 llalorella Bittner, 1890. 

 Aiistriella Bittner, 1800. 

 Norella Bittner, 1S!)0. 

 Peregrinella (Ehlert, 1887. 

 Ivhynchonellina Ceuimelaro, 1871. 

 Dimerella Zittel, 1870. 

 Acautliothyris d'Orbigny, 1850. 

 Hemitliyris d'Orbigny, 1847. 

 Frieleia Dall, 1805. 

 Cryptopora Jeffreys, 1809. 



Atretia Jeflreys, 1876. 



Neatretia CEhlert, 1891. 



Superfaiuily TEREBRATULACEA Waagen, 1883 (restricted). ^ 



Ancylopoda, Cryptubracbia, and Ancylobracbia (partim) Gray, 1848; Kampylopeg- 

 mata Waageu, 1883; Ancylopegmata Zittel, 1895. 



Derived Telotreniata with the l)rachia SLipi)orted by calcareous, 

 primitive, or metamorphosed loops. 



Section A. TEBEBEATULA. 



Terebratulacea with the loops unsupported by a median dorsal 

 septum at any stage of growth. Brachial cirri directed outward in 

 larval stages. 



1. Family CENTKONELLID.F: Hall and Chirke, 1895.^ 



Centronellinie Waagen, 1882; Beecber, 1893; Kensselajridiii Hall aud Clarke, 1895. 



Terebratulas with the loop developing direct aud composed of two 

 descending lamelhe, uniting in the median line and forming a broad, 

 arched j)late. 



'Terebratulacea Waagen is used here in preference to Ancylobracbia Gray, in violation of tbo law 

 of priority, for the aako of euplionj. 



2 Since Beecber'n " Itevision of tlio families of lo(>i>beariug I'rachiopoda " (Trans. Conn. Acad., 

 Vol. IX, 1893), it lias been sbown by ]5eecb(^r and Schucbert (Proc. Biol. Soc. Washington, Vol. VIII, 

 1893) that the loop in the family Terebratulidie, as limited in the former paper, does in part pasa 

 througli a abort .series of metamorphoses. This necessitates tbo removal of CentronellinfB from the 

 family Terebratulidie, since its loops remain essentially without change throughout growth. 



