382 SYNOPSIS OF AMEKICAN FOSSIL BRACUIOPODA. [bull. 87. 



Spirifer arctisegmentum Hall — Continued, 



Second Aiiu. J^cp. N. V. State Geol., 1883, pi. 59, ligs. 10-12.— Nettelroth, 



Kentucky Fossil Shells, Mem. Kentucky Geol. Survey, 1889, p. 108, pi. 12, 



figs. 14, 15. 

 Spirifer arctisegmeutus Hall and Clarke, Pal. New York, VIII, Pt. II, 1893, p. 36, 



pi. 31, figs. 10-12. 

 Loo. Stafford and Genesee counties. New York; Falls of Ohio. 



Spiriier arenosus (Conrad). Oriskany and Corniferous (Dev.). 



Delthyris arenosa Conrad, Third Ann. Rep. N. Y. Geol. Survey, 1839, p. Go. — 



Mather, Geol. N. Y. ; Rep. First Dist., 1843, p. 342, fig. 1.— Hall, Ibidem, Rep. 



Fourth Dist., 1843, p. 148, fig. 1. 

 Delthyris arenaria Vanuxem, Geol. N. Y. ; Rep. Third Dist., 1842, p. 123, fig. 1; 



p. 124, fig. 5. 

 Spirifer arenosa Rogers, Geol. Pennsylvania, II, Pt. II, 1858, p. 826, fig. 650. — 



Hall, Pal. New York, III, 1859, p. 425, pi. 98, figs. 1-8; pi. 99, figs. 1-10; pi. 



100, figs. 1-8. 

 Spirifera arenosa Billings, Geol. Canada, 1863, p. 960, fig. 465. — Hall, Second 



Ann. Rep. N. Y. State Geol., 1883, pi. 55, figs. 3-7. 

 Spirifera unica Hall, Pal. New York, IV, 1867, p. 203, pi. 30, fig. 21; pi. 55, 



fig. 8. 

 Spirifer arenosus Hall and Clarke, Pal. New York, VIII, Pt. II, 1893, pp. 24, 27, 



37, pi. 29, figs. 1-4; pi. 30, figs. 3-8. 

 Loc. Schoharie, Clarence Hollow, etc.. New York; Cumberland, Maryland; Vir- 

 ginia; Frankstown, Pennsylvania; Cayuga, Ontario. 



Spirifer argentarius Meek = Spirifer pinouensis. 

 Spirifer arrectus Hall = Spirifer inurchisoni. 



Spirifer asper Hall. Hamilton (Dev.). 



Spirifer aspera Hall, Geol. Survey Iowa, I, Pt. II, 1858, p. 508, pi. 4, fig. 7. 

 Spirifera (Cyrtina) aspera Whitfield, Geol. Wisconsin, IV, 1882, p. 331, pi. 26, 



figs. 1, 2. 

 Spirifer asper Hall and Clarke, Pal. New York, VIII, Pt. II, 1893, pp. 29, 31, 32, 



39, pi. 25, figs. 20-25. 

 Loc. Independence and Rockford, Iowa; Rock Island, Illinois ; Milwaukee, Wis- 

 consin ; Canandaigua, New York. 



Spirifer asperatus Ringueberg. Niagara (Sil.). 



Spirifera asperata Ringueberg, Bull. Buftalo Soc. Nat. Sci., V, 1886, p. 16, pi. 2, 

 fig. 5. 



Loc. Lockport, New York. 

 Spirifer atwateranus Miller = Spirifer iowaensis. 



Spirifer audaculus (Conrad). Marcellus and Hamilton (Dev.). 



Delthyris audacnla Conrad, Jour. Acad. Nat. Sci. Philadelphia, VIII, 1842, p. 262. 



Delthyris medialis Hall, Geol. N. Y. ; Rep. Fourth Dist., 1843, p. 208, fig. 8.— 

 Rogers, Geol. Pennsylvania, II, Pt. II, 1858, p. 828, fig. 669. 



Spirifer eatoni Hall, Tenth Rep. N. Y. State Cab. Nat. Hist., 1857, p. 157. 



Spirifer medialis Hall, Ibidem, 1857, p. 164, fig. 1. 



Spirifera medialis HaU, Pal. New York, IV, 1867, p. 227, pi. 38, figs. 1-25,— 

 Second Ann. Rep. N. Y. State Geol., 1883, pi. 54, figs. 1-13.— Nettelroth, Ken- 

 tucky Fossil Shells, Mem. Kentucky Geol. Survey, 1889, p. 125, pi. 26, figs. 2-5. 



Spirifera medialis var. eatoni Hall, Pal. New York, IV, 1867, pi. 38, figs. 12-18. 



Spirifera audacula Whitfield, Geol. Wisconsin, IV, 1882, p. 329, pi. 25, figs. 25, 26. 



Spirifer audaculus Hall and Clarke, Pal. New Y'ork, VIII, Pt. II, 1893, pp. 29-31, 

 39, pi. 24, tigs. 1-13; pi. 29, fig. 5. 



Loc. Otsego, Cayuga, Moscow, Darien, etc.. New York; Falls of Ohio; Milwau- 

 kee, Wisconsin. 



