BRACHIOPODA. 83 



Genus ATHYR IS, McCov. 1844. 



PLATliS XLV, XLVI, XLVII. 



1S31. Terehratida, Eaton. American Journal of Science, vol. xxi, p. 137. 



1S3'2. Tcrebratula, Eaton. Geological Text Book, p. 46. 



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



1842. Terehratula, d'Ohbig.my. Voyage dan.s I'Anierique Meriilionale, Pal. i>. 46, pi. iii, fig.s. 17-19. 



1813. Atrypa. Hall. Geology of N. Y. ; Rept. Fourth Dist., p. 198, tig. 5; Table."! of Organic Remains, 



No. 65, tig. 5. 

 1S44. Atliijris, Aiiiinouonclms, Seminnla, McCoy. Synopsis Cai-bon. Foss. Ireland, pp. 128, 146, 149, 



l.i8. 

 1847. Spirigera, d'Orbiuny. Comptes i'endu.s, vol. xxv, p. 268. 



1850 Athyris, Cleiuthyris, King. Permian Fossils of England, pp. 136-140, pi. x, tig.s. 1-10. 

 1850. Spirigei'a, d'Orbiony. Annates des Sciences Nat., vol. xiii, p. 337. 



1852. Terehratula, Hall. Stansbury's Expl. and Survey of the Valley of the Great Salt Lake, Utah, 



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



1853. Terehratula, Shumakd. Mai-cy's U. S. Expl. of the Red River of Louisiana, p. 202, pi. iv, tig. 8. 



1855. Terehratida, Schikl. Pacific Raili-oad Reports, vol. ii, p. 108, pi. i, fig. 2. 



1856. Terehratula, Hall. Pacific Railroad Repoi-ts, 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, David.son. Monogr. Brit. Permian Brach., pp. 20-23, pis. i, ii. 



1858. Athyris, Davidson. Monogj-. Bi-if. Carljon. Bracli., pp. 77-87, pis. xv. xvi, xvii, xviii. 



1858. Terehratida, Spirigera {Athyrin), Hall. Tran.sactions of the Albany Institute, vol. iv, pp. 7, 8. 



1858. Terehratida, Marcou. Geology of North America, pp. 51, 52, pi. vi, figs. 9, 10. 



1858. Spirifera, Rogers. Geology of Pennsylvania, vol. ii, jiart 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. S]nrigera, Meek and Hayden. Proc. Acad. Nat. Sci. Philadelphia, vol. iii, sec. ser., p. 20. 



1860. Athyris, Meek and Worthen. Pi-oc. Acad. Nat. Sci. Philadelphia, vol. iv, sec. ser., p. 451. 

 1>G0. Athyris, White. Journal Boston Soc. Nat. Hist., vol. vii, p. 229. 



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



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



1860. Athyris, Billungs. Canadian Journal, vol. v, p. 273. 



1860. Spirigera, Swallow. Trans. 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, Saltek. Quai-t. Journal Geol. Soc. London, vol. xvii, \>. 64, pi. iv, fig. 4. 

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



1861. Athyris, McChesney. New Palaeozoic 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. Stale Cab. Nat. Hist., p. ISO, figs. 1-4 ; pi. iii, figs. 10-13, 



15, 16, 24. 



1862. Athyris, Billings. Palseozoic Fosssils, 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. Winchell. 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. Athyrii, Davidson. Monogr. Brit. Devon. Brach., p. 13-19,pls. iii, iv. 

 ? 1865. Athyris, Shaler. Bull. Mus. Comparative Zoology, No. 4, p. 69. 



1865. Spirigera, A. Winchell. Proc. Acad. Nat. Sci. Philadelphia, vol. ix, i)p. 117, 118. 



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



