206 SYNOPSIS OF AMERICAN FOSSIL BRACHIOPODA. [bull. 87. 



DELTHYRIS Dalman. Genotype Deltliyris elevata Dalmaii. 



Dolthyris Dalman, Kougl. Svenska Vet.-Akad. Ilandl., IT.r 1827, 1828, pp. 93,99.— 



Dall, American .lour. Conch., VI, 1870, p. IIG.— Hall and Clarke, Pal. New 



York, VIII, Pt. II, 1893, pp. 9 and Ki under caption Septati (non p. 19). 



Spirifera "lamellosa" Hall, Ninth Ann. Rep. New York State Geol., 1890, p. 11. 



Obs. Specimens of D. elevata examined by the writer show a distinct median 



septum in the ventral valve. 



Delthyris acanthoptera Conrad =Spirifer acanthopterus. 



Deltbyris acanthota Hall = Spirifer disjunctus. 



Delthyris acuminata Conrad =Spirifer acuminatus. 



Deltliyris acuminata Hall (non Conrad) =D. mesicostalis. 



Deltliyris acutilirata Conrad = riatystropliia acutilirata. 



Delthyris arenaria Vanuxem=Spirifer arcnosus. 



Delthyris arenosa Conrad =Spirifer arenosus. 



Delthyris audacula Conrad =Spirifer audaculus. 



Delthyris bialveata Conrad = Spirifer radiatus. 



Delthyris biloba Conrad =Bilobites various. 



Delthyris brachynota nail=Platystrophia biforata. 



Delthyris chemungensis Conrad =Spirifer disjunctus. 



Delthyris congesta Hall=Spirifer granulosus. 



Delthyris consobrina (d'Orbigny). Hamilton (Dev.). 



Delthyris ziczac Hall (non Roemer), Geol. New York; Rep. Fourth Dist., 1843, 

 p. 200, fig. 5. 



Spirifera consobrina d'Orbigny, Prodrome Pal., I, 1850, p. 98.— Miller, N. Ameri- 

 can Geol. Pal., 1889, p. 372. 



Spirifer clio Hall, Thirteenth Rep. Now York State Cab. Nat. Hist., 1860, p. 94. 



Spirifera ziczac Hall, Pal. New York, IV, 1867, p. 222, pi. 35, Hgs. 1.5-23;— Second 

 Ann. Rep. New York State Geol., 1883, pi. 59, fig. 9; pi. 60, fig. 18.— Whit- 

 field, Annals New York Acad. Sci., V, 1891, p. 554, pi. 11, fig. 13;— Geol. 

 Ohio, VII, 1895, p. 448, pi. 7, fig. 13. 



Spiriferina? ziczac Whitfield, Geol. Wisconsin, IV, 1882, p. 332, pi. 25, figs. 23, 24. 



Spirifer eonsobrinus Hall and Clarke, Pal. New Y'ork, VIII, Pt. II, 1895, pi. 34, 

 figs. 9, 18; pi. 37, figs. 9, 10. 



Loc. Moscow, York, Darien, etc., New York; Columbus, Ohio; Milwaukee, Wis- 

 consin; Louisville, Kentucky. 



Delthyris cuspidata Hall = Spirifer disjunctus. 

 Delthyris decemplicatus Hall = D. sulcata. 

 Delthyris disjuncta Hall = Spirifer disjiuictus. 

 Delthyris duodenaria Hall=Spirifer duodenarius. 

 Delthyris duplicata Conrad = Spirifer duplicatus. 

 Delthyris euruteines Owen = Spirifer eurnteiiies. 

 Delthyris expansa Owen=Pterotheca expansa, a Pteropod. 

 Delthyris fimbriata Conrad =Iieticularia finibriata. 

 Delthyris granulifera Hall = Spirifer granulosus. 

 Delthyris granulosa Conrad = Spirifer granulosus. 

 Deltliyris inermis Hall = Spirifer disjunctus. 

 Delthyris Levis Hall=Reticularia la'vis. 

 Delthyris lynx Hall=Platystrophia lynx and biforata. 

 Delthyris macronota Hall = Spirifer macrouotus. 



