SCHUCHEET. 



INDEX AND BIHLIOGRAl'HY. 151 



Atryi)ii calviui ]Srettelioth = A. nigosa. 



Atrypa caraura E[all=Trematospiia cauuira. 



Atrypa eapax Conrad =Rhyuchotrenia capax. 



Atrypa chemungeusis Conrad=A. reticularis. 



Atrypa circulus Hall=Parastropliia hemiplicata. 



Atrypa com is Owen=Gypidula comis. 



Atrypa coiiceutrica Conrad, and Hall = Atliyris spiriferoides. 



Atrypa concinua Hall=Nucleospira conciuna. 



Atryi)a congesta Conrad=Hyattella congesta. 



Atrypa congregata Conrad=Camarot(Bchia cougregata. 



Atrypa contracta Hall=Camarotcecliia contracta. 



Atrypa corallifera Hall=Dictyonella corallil'era. 



Atrypa crassirostrum Hall=Whitfie]della cylindrica. 



Atrypa cuboides Vanuxeui, and Ilall^IIypotliyris cuboides. 



Atryi)a cuneata Hall = Kbynchotretra cuneata americana. 



Atrypa cuspidata Hall=Triplecia cuspidata. 



Atrypa cybndrica Hall=Whittieldella cylindrica. 



Atrypa detlecta Hall=Zygospira detlecta. 



Atrypa dentata Hall=Rbynch()trema dentata. 



Atrypa desquamata Sowerby. Middle Devonian. 



Atrypa desciuamata .Sowerby, Trans. Geol. Soc, 2d ser., V, 1840, pi. 50, ligs. 



19, 20.— Walcott, Mon. U. S. Geol. Survey, VIII, 1.S84, p. 150, pi. 14, fig. 4. 

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



Atrypa disparilis nall=Atrypina disparilis. 

 Atrypa dnbia Hall^Protorhyncha dubia. 

 Atrypa duinosa Hall = A. spinosa. 

 Atrypa dnplicata IIall=Caniarottechia duplicata. 



Atrypa ellipsoidea ISTettelrotli. Cornifeions (Dev.). 



Atrypa ellipsoidea Nettelroth, Kentucky Fossil .Shells, Mem. Kentucky Geol. 



Survey, 1889, p. 90. 

 Loc. Falls of Ohio. 



Atrypa elongata Conrad=Renssel;eria ovoides. 



Atiypa euuicerata IIall = Itliyn(;honella eniacerata. 



Atrypa c(i[uira(liata IIall = Caniarot(t'cliia eipiiradiata. 



Atrypa exigua lIall=Zygospira exigiia. 



Atryi)a eximia I:iall=Caniarot(Ecbia exiinia. 



Atrypa extans Eninions=TripIecia extans. 



Atrypa flabella Sbalcr=Anoplotbeca bemi.spberica. 



Atrypa fiabellites Coiirad=Anoplotbeca tlabcllite.s. 



Atrypa galeatus Dalmau=Gypidula galeata. 



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



Atrypa gibbosa Hall, I'al. New York, II, 18.52, p. 79, pi. 20, lig. 10. 

 Loc. Clinton, New York. 



Atrypa globnliformis yanuxein = Leiorbyii(!bus globuliforme. 

 Atrypa bemiplicata Hall^Parastropbia bemiplicata,. 

 Atrypa bemispberica Sowerby=Anoplotbeca bemisi>berica. 

 Atrypa birsuta Hall=Parazyga birsuta. 



