284 SYNOPSIS OF AMERICAN FOSSIL BRACHIOPODA. (bull. 87. 



Ortliis caiialis Iiiill=I)aliiuiiiella elegaiitula. 

 Oitbis carbouaria Swallow =:Jlbipi{loiiiella pecosi. 

 Ortbis cariuata nall=S('bizopboria cariuata. 

 Ortbis carleyi Hall = Diiioi'tbis retiorsa. 



Orthis carausii Salter. Calciferous (Ord.). 



Ortbis carausii (Salter, MS.) Davidson, Geol. Mag. London, V, 1868, p. 315, pi. 



16, fig. 23. 

 Ortbis carausii? Matthew, Trans. Royal Soc. Canada, X, 1893, p. 102, pi. 7, fig. 7. 

 Loc. England; near St. Jobu, New Brunswick. 



Ortbis (?) centrilineata Hall. Lorraine (Ord.). 



Orthis centrilineata Hall, Pal. New York, I, 1847, p. 289, pi. 79, fig. 5*. 

 Loc. Lorraine and Turin, New York. 



Ortbis centrosa Miller =Platystropbia crassa. 



Ortbis cbarlotta^ Wiiicbell=Dinortbis pectinella. 



Ortbis ciucinuatiensis Miller=Ortbis? puraila. 



Ortbis (?) circularis N. H. Wincbell = I)alinauella subiequata circularis. 



Ortbis circulus nall=Rbipidomella circiilus. 



Ortbis clarkeusis Swallow=Rbipidomella clarkeusis. 



Ortbis cleobis Hall=Kbipidomel]a cleobis. 



Ortbis clytie Hall=:Heterortbis clytie. 



Ortbis coloradoensis Meek, 1870= Ortbis ? desmoplenra. 



Ortbis coloradoensis Sbumard=Billingsella coloradoensis. 



Ortbis concinna Hall=Dalmanella coucinua. 



Orthis (?) concinna Morris and Sbarpe. Lower Devonian. 



Orthis concinna Morris and Sbarpe, Quart. Jour. Geol. Soc. London, II, IS^ie, p. 



275, pi. 10, fig. 2. 

 Loc. Falkland Islands. 

 Ohs. Probably a species of Orthotbetes. 



Ortbis conradi Castelnaii = Hipparionyx proximns. 



Ortbis conradi N. H. Wincbell = Dalmaiiella subiequata conradi. 



Ortbis cooperensis Swallow=Rbipidomella dubia. 



Ortbis cora d'Orbig'ny=Scbizopboria cora. 



Ortbis corinna Billings. Calciferous (Ord.). 



Ortbis corinna Billings, Pal. Fossils, I, 1865, p. 302, fig. 292. 

 Orthis ? corinna Hall and Clarke, Pal. New York, VIII, Pt. 1, 1892, p. 217. 

 Loc. Stanbridge, Quebec, Canada. 



Ortbis corpulenta Sardeson=Dalmanella testudinaria meeki. 



Orthis costalis Hall. Chazy (Ord.). 



Ortbis costalis Hall, Pal. New Y^ork, I, 1817, p. 20, pi. 4 bis, fig. 4;— Second Ann. 

 Rep. N. Y. State Geol., 1883, pi. 34, figs. 35-38.— Hall and Clarke, Pal. New 

 York, VIII, Pt. I, 1892, pp. 221, 228, pi. 5, figs. 15-17. 

 Loc. Cbazy, New Y^ork. 



Ortbis costata Hall (non Sowerby) = Ortbis pumila. 



Ortbis crassa James =Platystropbia crassa. 



Ortbis crenistria Geiiiitz=Derbya crassa. 



Ortbis crisijata Emmons = Dalmanella crispata. 



Ortbis cumberlandia Hall = Rbipidomella cnmbeiiaudia. 



Ortbis cuueata Owen=Rbii)idomella cuneata. 



