382 SYNOPSIS OF AMERICAN FOSSIL BRACHIOPODA. [buul.87. 



Spirifer arctisegmentum Hall — Continued. 



Second Auu. Rep. X. Y. State Geol., 1883, pi. 59, figs. 10-12.— Nettelroth, 



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



figs. 14, 15. 

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



pi. 31, figs. 10-12. 

 Loc. Stafford and Genesee counties, New York; Falls of Ohio. 



Spirifer arenosus (Conrad). Oriskany and Comiferous (Dev.). 



Delthyris arenosa Conrad, Third Ann. Rep. N. Y. Geol. Survey, 1839, p. 65. — 



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



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

 Delthyris arenaria Yamixem, 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 pinonensis. 



Spirifer arrectus Hall= Spirifer murchisoni. 



Spirifer asper Hall. Hamilton (Dev.). 



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



Spirifera (Cyrtina) aspera AVhitfield, 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 ; Canaudaigua, New York. 



Spirifer asperatus Eingueberg. Niagara (Sil.). 



Spirifera asperata Ringueberg, Bull. Buffalo 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 audacula 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 Hall, 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 York, A'lII, Pt. II, 1893, p]). 29-31, 

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



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

 kee, Wisconsin. 



