BRACHIOPODA. 83 



Genus ATHYRIS, McCoy. 1844. 



PLATES XLV, XLVI. XLVII. 



1831. Terebratida, Eatok. Ainencan Journal of Science, vol. xxi, p. 137. 



1832. Terebratula, Eatos. Geological Text Book, p. 46. 



1S38. Atrypa, Conrad. Second Ann. Rept. Geol. Survey of N. Y., p. 111. 



1842. Terdtratula, d'Orbigxy. Voyage dans I'Amerique Meridionale, Pal. p. 46, pi. iii, figs. 17-19. 



1813. Atrypa, Hall. Geology of N. Y. ; Rept. Fourth Diet., p. 198, fig. 5; Tables of Organic Remains, 



No. 65, tig. 5. 

 1844. Athyria, Actinoconchus, Seminula, McCoy. Synopsis CarVon. Foss. Ireland, pp. 128, 146, 149, 



158. 

 1847. Spirigera, d'Orbignt. Comptes rendus, vol. xxv, p. 268. 



1850 Athyris, Cleiiithyris, Kinu. Permian Fossils of England, pp. 136-140, pi. x, figs. 1-10. 

 1850. Spirigera, d'Orbig.ny. Annales des Sciences Nat., vol. xiii, p. 337. 

 1862. Terebratida, Hall. Stansbui-y's Expl. and Survey of the Valley of the Great Salt Lake, Utah, 



p. 409, pi. iv, figs. 1, 2. 

 1853. TerebraivXa, Shumard. Marcy's U. S. Expl. of the Red River of Louisiana, p. 202, pi. iv, fig. 8. 



1855. Terebratula, Schikl. Pacific Railroad Repoi-ts, vol. ii, p. 108, pi. i, fig. 2. 



1856. Terebratula, Hall. Pacific Railroad Reports, vol. iii, p. 101, pi. ii, figs. 3-5. 



1857. Spirigera, Hall. Tenth Rept. N. Y. State Cab. Nat. Hist., p. 153, figs. 1, 2. 



1857. Athyris, Davidso.v. Monogr. Brit. Permian Brach., pp. 20-23, pis. i, ii. 



1858. Athyris, Davidson. Monogr. Brit. Carbon. Brach., pp. 77-87, pis. xv, xvi, xvii, xviii. 



18158. Terebratula, Spirigera {Athyris), Hall. Transactions of the Albany Institute, vol. iv, pp. 7, 8. 



1858. Terebratula, Marcod. Geology of North America, pp. 51, 52, pi. vi, figs. 9, 10. 



1858. Spin/era^ Roobrs. Geology of Pennsylvania, vol. ii, part ii, p. 828, fig. 667. 



1858. Athyris, Hall. Geol. Survey of Iowa, vol. i, part ii, pp. 600, 659, 702, 703, 714 ; pi. xii, fig. 6 ; 



pi. xxiii, figs. 4, 5 ; pi. xxvii, figs. 1, 2. 



1859. Spirigera. Mbbk and Haydkx. Proc. Acad. Nat. Sci. Philadelphia, vol. iii, sec. ser., p. 20. 



1860. Athyris, Mekk and Wobthbn. Proc. Acad. Nat. Sci. Philadelphia, vol. iv, sec. ser., p. 451. 

 1>60. Athyris, Whitk. Journal Boston Soc. Nat. Hist., vol. vii, p. 229. 



1860. Athyris, Hall. Thiiteenth Rept. N. Y. State Cab. Nat. Hist., pp. 73, 89, 93, figs. 1-47, p. 94. 



1860. Athyris, McChksnby. New Palaeozoic Fossils, pp. 46, 47, 80, 81. 



1860. Athyris, Billi.ng.s. Canadian Journal, vol. v, p. 278. 



1860. Spirigera, Swallow. Ti-ans. St. Louis Acad. Sci., vol. i, pp. 649-652. 



1861. Athyris, Newberry. Ive's Rept. on the Colorado River of the West, p. 126. 

 1861. Athyris, Saltbr. Quart. Journal Geol. Soc. London, vol. xvii, p. 64, p]. iv, fig. 4. 

 1861. Athyris, BiLLmns. Canadian Journal, vol. vi, pp. 138, 145, figs. 54-57. 



1861. Athyris, McChbsnky. New Palteozoic Fossils, pp, 78, 79, 81. 



1861. Athyris, Hall. Fourteenth Rept. N. Y. State Cab. Nat. Hist., p. 99. 



1862. Athyris, Hall. Fifteenth Rept. N. Y. State Cab. Nat. Hist., p. 180, figs. 1-4 ; pi. iii, figs. 10-13, 



15, 16, 24. 



1862. Athyris, Billings. Palseozoic Fossils, vol. i, p. 144. 



1863. Athyris, Billings. Geology of Canada, p. 373, fig. 399 ; p. 385, fig. 421. 

 1863. Spirigera, Swallow. Trans. St. Louis Acad. Sci., vol. ii, pp. 83-91. 



1863. Spirigera, A. Winchbll. Proc. Acad. Nat. Sci. Philadelphia, vol. vii, sec. ser., p. 6. 



1863. Athyris, Davidson. Quart. Journal Geol. Soc. London, vol. xix, p. 170, pi. ix, figs. 4, 5. 



1864. Athyris, Daviuson. Monogr. Brit. Devon. Brach., p. 13-19, pis. iii, iv. 

 t 1865. Athyris, Shalbb. Bull. Mus. Comparative Zoology, No. 4, p. 69. 



1865. Spirigera, A. Winchbll. Proc. Acad. Nat. Sci. Philadelphia, vol. ix, pp. 117, 118. 



1866. Spirigera, A. Winchbll. Geol. Rept. of the Lower Peninsula of Michigan, p. 94, 



