BCHiTHEinM INDEX AND BII5LI0GUAPHY. 151 



Atiyi»;i csih iiii Ncttelr(>th = A. iu.i;(ts;i. 



Atrypa camuni Hall = 'ri«'iniit(>spii;i camuia. 



Atrypa capax Conia(l = Kliyiich()tieiiia capax. 



Atrypa cliemuiigeiisis Conrad=A, reticulaiis. 



Atrypa circiilus Hall=:Parasti-oi)liia heiuiplicata. 



xVtrypa coinis 0\ven=(rypidula couiis. 



Atrypa couceutrica Conrad, and Hall=Atliyris spiriferoides. 



Atr^^pa coiicinua naIl = NucIe()spira cuiiciiiua. 



Atrypa congesta Courad = Hyattella coiigesta. 



Atrypa cougregata Conrad=Caniarot(Bcliia congregata. 



Atrypa coiitracta Hall=Caniarot<i'cliia coiitracta. 



Atrypa corallifera Ilall^Dictyonella corallilera. 



Atrypa crassirostrum Hall=Wliitfieldella cyliudrica. 



Atrypa cuboides Vaiiuxem, and IIall = Hy]»()tliyris cuboides. 



Atrypa cuiieata IIall=Kbyiicliotretra rnneata americaua. 



Atrypa cuspidata Hall=Triplecia cuspidata. 



Atrypa cyliudrica Hall=Wljittieldena cylindrica. 



Atrypa detlecta lIall = Zygospira deflecta. 



Atrypa deiitata Hall=RLyucbotrema deutata. 



Atrypa desquamata Sowerby. Middle Devonian. 



Atryiia desquamata Sowerby, Trans. Geol. Soc., 2d ser., V, 1840, pi. 5(5, tigs. 



19, 20.— Walcott, Mou. IT. 8. Geol. Survey, VIII, isgi, p. 150, pi. 14, lig. 4. 

 Loc. Europe; Petoskey, Michigan; Eureka district, Nevada. 



Atrypa disparibs Hall=Atrypina dispariUs. 

 Atrypa dubia Hall = Protorbyncba dubia. 

 Atrypa dumosa Hall = A. spinosa. 

 Atrypa duplicata Hall=Camarotcechia duplicata. 



Atrypa ellipsoidea ISTettelroth. Corniferonis (Dev.). 



Atrypa eIlii),soidea Nettelroth, Kentucky Fossil Shells, Mem. Kentucky Geol. 



Survey, 1880, p. 90. 

 Loc. Falls of Ohio. 



Atrypa elougata Conrad = Rensselteria ovoides. 



Atry[);i ciuacerata Hall=Rbyn(;bonella emacerata. 



Atrypa c(i[uiradiata Hall = Canuirot(ecbia e({uiradiata. 



Atrypa cxigna HaU=Zygospira cxigiia. 



Atrypa cximia Hall=Caniarot(ccbia eximia. 



Atryi)a extans Eunnons=TripIecia extans. 



Atrypa llabella Sbalor = Aiu:>plotlieca liemispberica. 



Atryi)a llabellites Co:irad = Auoplotheca tlabcllites. 



Atrypa galeatus Dalman = Gypidula galeata. 



Atrypa(?) gibbosa Hall. Clinton (Sil). 



Atrypa gibbosa Hall, Pal. New York, II, 18.52, p. 79, pi. 20, fig. 10. 

 Loc. Clinton, New York. 



Atrypa globuliforiuis Vanuxeni^Leiorbyncbus globuliforme. 

 Atryini beniiplicata liall = Parastropbia bcmiplicata. 

 Atrypa bemispberica !Sowerby=Anoplotbeca bemispberica. 

 Atrypu birsuta nall=Parazyga birsuta. 



