18 
PALEONTOLOGY OF NEW YORK. 
(2) 1842. 
(la) 1843. 
(la) 1843. 
(Ifo) 1843. 
(la) 1843. 
(la) 1849. 
(la) 1852. 
(Id) 1852. 
(2) 1853. 
(la) 1857. 
(2) 1858. 
(la) 1859. 
(16) 1859. 
(2) 1860. 
(la) 1861. 
(2) 1861. 
(2) 1862. 
(16) 1863. 
(la) 1863. 
(la) 1863. 
(la) 1867. 
(16) 1867. 
(2) 1867. 
(2) 1868. 
(la) 1868. 
(la) 1874. 
(la) 1879. 
(la) 1879. 
(la) 1881. 
(16) 1882. 
(2) 1884. 
(2) 1884. 
(16) 1888. 
(la) 1889. 
(la) 1889. 
(la) 1891. 
DeWiyris, Conrad. Jour. Acad. Nat. Sci. Philadelphia, vol. viii, p. 263. 
Orthis? (DeUhyris), Hall. Geology of N. Y. ; Kept. Fourth Dist., p. 142, fig. 1. 
Delthyi'is, Hall. Geology of N Y. ; Kept. Fourth Dist., p. 105, fig. 3; p. 171, fig. 5. 
BeWiyris, Hall. Geology of N. Y. ; Kept. Fourth Dist., p. 208, fig. 10; p. 345, fig. 1. 
Spirifer, Castblnau. Essai sur le Syst^me Silur. de I’Amer, Septentr., p. 41, pi. xii, figs. 1, 2. 
jSpirifer, Hall. American Journal of Science, vol. xx, p. 228. 
/Spirife)', Hall. Palseontology of N. Y., vol. ii, p. 262, pi. liv, figs. 3a-k; p. 328, pi. Ixxiv, 
figs. 2a-h. 
/Spirifer, Hall. Palaeontology of N. Y., vol. ii, jj. 263, pl. liv. fig. 4. 
Spirifei', Swallow. Trans. St. Louis Acad. Science, vol. ii, p. 86. 
Spirifer, Hall. Tenth Kept. N. Y. State Cab. Nat. Hist., pp. 58, 62. 
Spirifer, Hall. Geol. Survey Iowa, vol. i, pt. ii, p. 505, pl. iv, figs. 5a-e; p. 645, pl. xx, 
fig. 4 ; p. 705, pl. xxvii, fig. 4. 
Spirifer, Hall. Palaeontology of N. Y., vol. iii, p. 420, pl. xcvi, figs. 8 a-e ; p. 422, pl. xcvii, 
figs, la-h, 2a-i; p. 205, pl. xxviii, figs. 4a-e; p. 199, pl. xxv, figs, la- 2 ; 
p. 203, jfi. xxviii, figs. 2 a-/; p. 198, pl. viii, figs. 17-23. 
Spirifer, Hall. Palaeontology of N. Y., vol. iii, p. 203, pl. xxviii, fig. 1. 
Spirifer, McChbsnby. New Palaeozoic Fossils, p. 43. 
Spirifera, BiLLiN(iS. Canadian Journal, vol. v, p. 256, figs. 65-67. 
Spirifera, Billings. Canadian Journal, vol. v., p. 257, figs. 68-70. 
Spirifera, White and Whitfield. Proc. Boston Soc. Nat. Hist., vol. viii, p. 116, pl. iii, fig. 15. 
Spirifera, Billings. Proc. Portland Soc. Nat. Hist., vol. i, p. 116, pl. iii, fig. 15. 
Spirifera, Hall. Transactions of the Albany Institute, vol. iv, p. 212. 
Spirifei-a, Billings. Geology of Canada, p. 372, figs. 394 a, 6, c; p. 960, fig. 466 ; p. 957, 
fig. 457. 
Spirifera, Hall. Palaeontology of N. Y., vol. iv, p. 189, jil xxvii, figs. 13-16; pl. xxviii, 
figs. 24-33. 
Spirifera, Hall. Palaeontology of N. Y., vol. iv, p. 239, pl. xxxix, figs. 1-12. 
Spirifera, Hall. Palaeontology of N. Y., vol. iv, p.’214, pl. xxxiii, figs. 1-21; p. 250, 
pl. xxxiii, figs. 31-35. 
Spirifer, Meek and Worthbn. Geol. Survey Illinois, vol. iii, p. 434, pl. x, figs. 5 a-e. 
Spirifera, Meek and Worthen. Geol. Survey Illinois, vol. iii, p. 399, pl. viii, figs. 6 a-d, 
figs. 7 a, b. 
Spirifera, Bii, lings. Palaeozoic Fossils, vol. ii, p. 48, pl. iii a, figs. 4, 4 c. 
Spirifera, Hall. Twenty-eighth Ann. Kept. N. Y. State Mus., p. 157, pl. xxiv, figs. 6-12,19. 
Spirifera, Rathbun. Proc. Boston Soc. Nat. Hist., vol. xx, p. 25. 
Spirifera, Hall. Eleventh Ann. Kept. State Geologist Indiana, p. 295, pl. xxiv, figs. 6-12,19. 
Spirifera, Hall. Eleventh Ann. Kept. State Geologist Indiana, p. 297, pl. xxvii, figs. 8, 9. 
Spirifera (Martinia), White, Thirteenth Annual Report State Geologist of Indiana, p. 133, 
pl. xxvii, figs. 4-6. 
Spirifera (Martinia), Walcott. Palaeontology Eureka Dist., pp 143-145, pl. iii, figs. 3, 6 ; 
pl. xiv, fig. 11. 
Spirifera, Calvin. Bull. Laboratories University of Iowa, p. 28. 
Spirifera, Nbttelroth. Kentucky Fossil Shells, p. 114, pl. xii, figs. 12, 13, 16; ji. Ill, 
pl. xvii, figs. 36, 37. 
Spirifer, Beecher and Clarke. Mem. N. Y. State Mus., vol. i. No. 1, p. 75, pl. vi, 
figs. 4-7. 
Spirifera, Whitfield. Annals N. Y. Acad. Science, vol. v, p. 509, pl. v, figs. 4, 5. 
Shells with few low plications or none ; hinge line not greatly extended, 
often shorter than the greatest diameter of the shell; dental lamellae moderately, 
