322 
PALAEONTOLOGY OF NEW YORK. 
1858. Productus, Hall. Geol. Survey Iowa, vol. i, part 2, pp. 635-639, 674, 675, 712, pi. xii, fig. 3; 
pi. xix, figs. 1-4; pi. xxiv, figs. 1-3; pi. xxviii, figs. 3-4. 
1858. Productus, Hall. Trans. Albany Inst., vol. iv, pp. 12, 13. 
1858. Productus, Swallow. Trans. St. Louis Acad. Sci., vol i, pp. 181, 1S2, 215-217. 
1858. Productus, Shumard. Trans. St. Louis Acad. Sci., vol. i, pp. 290-292, pi. xi, fig. 8. 
1858. Productus, Rogers. Geol. Penna , vol. ii, part 2, p. 833. 
1858. Productus, Marcou. Geology North America, pp. 45-48, pi. v, figs. 3-6; pi. vi, figs. 1, 3-7, 12. 
1859. Productus, Meek and Hayden. Proc. Acad. Nat. Sci. Phila., pp. 25, 26. 
1860. Productus, Meek. Proc. Acad. Nat. Sci. Phila., vol. xii, p. 309. 
1860. Productus, Meek and Worthen. Ibidem, pp. 450, 451. 
1860. Productus, Worthen. Trans. St. Louis Acad. Sci., vol. i, p. 570. 
1860. Productus, White. Journ. Boston Soc. Nat. Hist., p. 230. 
1860. Productus, Swallow. Trans. St. Louis Acad. Sci., vol. i, pp. 640, 641. 
1860. Productus, McChesney. Descrip. New Species Palaeoz. Foss., pp. 34-40. 
1861. Productus, Salter. Quart. Jour. Geol. Soc. Lond., vol. xvii, p. 64. 
1861. Productus, Newberry. Ives’ Rept. Expl. Colorado River of the West, pp. 121-125, pi. i, fig. 7 ; 
pi. ii, figs. 1-10. 
1861. Productus, Meek & Worthen. Proc. Acad. Nat. Sci. Phila., p. 142. 
1862. Productus, White. Proc. Bost. Soc. Nat. Hist., vol. ix, p. 29. 
1863. Productus, Swallow. Trans. St. Louis Acad. Sci., vol. ii, pp. 91-94. 
1863. Producta, A. Winchell. Proc. Acad. Nat. Sci. Phila., vol. xv, p. 4. 
1864. Productus, Meek. Palaeontology of California, vol. i, p. 11, pi. ii, fig. 4. 
1865. Productus, A. Winchell. Proc. Acad. Nat. Sci. Phila., pp. 112-115. 
1866. Productus, Geinitz. Carbon and Dyas in Nebraska, pp. 52, 54, 81, pi. iv, figs. 1-11. 
1866. Productus, Meek & Worthen. Geol. Surv. Illinois, vol. iii, pp. 280, 297, 320, pi. xx, fig. 5; pi. 
xxiii, fig. 4; pi. xxvi, fig. 4. 
1867. Productus, Hall. Palaeontology New York, vol. iv, p. 146. 
1867. Productus, Hall. Twentieth Rept. N. Y. State Cab. Nat. Hist, p. 245. 
1868. Productus, McChesney. Trans. Chicago Acad. Sci., vol. i, pp. 24-27, pi. i, figs. 7-11; pi. vi, fig. 1. 
1868. Productus, Meek & Worthen. Geol. Surv. Illinois, vol. iii, p. 528, pi. xx, fig. 7. 
1870. Producta, A. Winchell. Proc. American Philos. Soc., vol. xii, p. 249. 
1871. Productus, Meek. Palaeontology Eastern Nebraska, pp. 159-169, pi. i, fig. 14; pi. ii, figs. 2, 5, 
6; pi. iv, figs. 5, 6; pi. v, figs. 6, 7, 11, 13; pi. vi, figs. 6, 7; pi. viii, figs. 
6, 9, 10, 13. 
1873. Productus, Worthen. Geol. Surv. Illinois, vol. v, p. 569; pi. xxv, fig. 9. 
1873. Productus, Meek & Worthen. Ibidem, p. 569, pi. xxv, figs. 8, 10, 13. 
1874. Productus, Derby. Bull. Cornell Univ., vol. i, pp. 47, 49, 51, 54, 56, 59, pi. i, figs. 2, 10-13, 15; 
pi. ii, figs. 14, 17; pi. iii, figs. 20, 41-44, 46-49; pi. iv, figs. 1-4, 7-11, 13, 
16; pi. vi, figs. 1, 4-7, 9, 17, 18; pi. vii, figs. 5-7,15,16; pi. ix, figs. 12,13. 
1875. Productus, Meek. Palaeontology Ohio, vol. ii, p. 282, 283, pi. x, figs. 3, 4. 
1875. Productus, White. Wheeler’s Geogr. and Geol. Surv. west 100th meridian, pp. 83, 109-116, 120, 
pi. v, fig. 6; pi. vii, figs. 1, 2 ; pi. viii, figs. 1-6. 
1876. Productus, Meek. Bull. U. S. Geol and Geogr. Surv. Terr., vol. ii, p. 354, pi. i, fig. 1. 
1876. Productus, Derby. Bull. Mus. Comp. Zool., vol. iii, pp. 280, 281. 
1876. Productus, Newberry. Rept. Macomb’s Expl. Exped. from Santa Fe to junction of Grand and 
Green Rivers of the Great Colorado of the west. 
1877. Productus, Hall & Whitfield. U. S. Geol. Expl. 40th Parallel, vol. iv, pp. 265-268, pi. v, 
figs. 3-12. 
1877. Productus, Meek. Ibidem, pp. 64-67, 69, 72-76, pi. vii, figs. 3-8; pi. viii, figs. 2-4. 
1878. Productus, Dawson. Acadian Geology, third ed., pp. 296, 297. 
1880. Productus, White. Proc. U. S. Nat. Mus., p. 46. 
1881. Productus, White. Tenth Ann. Rept. Indiana State Geologist, p. 148, pi. viii, figs. 7, 8. 
