BRACHIOPODA. 187 



1842. Belthyris (partim), Conkad. Journ. Acad. Nat. Sci., Philadelphia, vol. viii, pp. 260, 262. 



1843. Spirifer, Castelnau. Essai sur le Syst. Sil. de I'Amerique septentrionale, p. 42. 



1843. OrtJiis, StToplimnena, Conkad. Proc. Acad. Nat. Sci., Pliiladelphia, vol. i, pp. 133, 332, 333. 



1843. Orthis, Delthyris, Atrypa ? Hall. Geolog-y of N. Y. ; Kept. Fourth Dist., pp. 70, 71, 10!5, 175, 215, 



267, 271. 



1844. OiiMs, DeWiyris (partim), Owen. Rept. Geo!. Expl. Iowa, Wisconsin and Illinois, plates xii, 



xiv, XV, xvii. 



1845. Ortlm, Hall. American Journal of Science, vol. xlviii, p. 294. 



1846. OrtJ/is, McCoy. Synojisis Silurian Fossils Ireland, p. 32. 



1847. Oj-tUs, DeWiyris, Leptma, Hall. Pala3ontolog-y of N. Y., vol. i, pp. 20, 113, 117, 136, 288, 289. 

 1847. Orthis, Yandell and Shumaed. Contribution Geolog^y Kentucky, p. 21. 



1852. OrtJiis, Owen. Rept. Geol. Surv. Wisconsin, Iowa and Minnesota, ji. 585. 



1852. Orthit, Spirifer, Hall. Paljeonlology of N. Y,, vol. 11, pp. 56-58, 65, 252-255, 260. 



[1] 1855. Orthis, Shumaed. Rept. Geol. Surv. Missouri, p. 205. 



1856. Orthis, Billings. Canadian Naturalist and Geologist, vol. i, pp. 40, 134, 136, 205, 206. 



1857. Orthis, Hall. Tenth Ann. Rept N. Y. State Cab. Nat. Hist., pp. 41-46, 102, 110, 135. 

 1857. Orthis, Billings. Rept. Prog-. Geol. Surv. Canada, p. 296. 



1857. Orthis, Cox. Owen's Geol. Surv. Kentucky, vol. iii, p. 570. 



1858. 0rf7rj.5, Maecou. Geology of North Amei-ica, p. 48. 



1858. Orthis, Hall. Transactions Albany Institute, vol. iv, p. 12. 



1858. Orthis, Hall. Geology of Iowa, vol. i, pt. ii, pp. 486, 596. 



1858. Orthis, Delthyris, Rogees. Geology of Penn., vol. ii, part 2, pp. 818, 820. 



1858. Orthis, Swallow. Trans. St. Louis Acad. Science, vol, i, p. 218. 



1859. Oi-this, Billings. Hind's Expl. Assiniboine, Saskatchawan, etc., p. 193. 



1859. Orthis, Billings. Canadian Naturalist and Geologist, vol. iv, pp. 434-440, 442. 



1859. Orthis, Saltee. Canadian Organic Remains, Decade i, p. 39. 



1859. OHliis, Hall. Palajontology of N. Y., vol. iii, pp. 162-172, 174-176, 179, 409, 481. 



1859. Orthis, Strophomena, Hall. Twelfth Ann. Rept. N. Y. State Cab. Nat. Hist., pp? 66, 70, 72, 85. 



1860. OrtMs, Hall. Thirteenth Ann. Rept. N. Y. State Cab. Nat. Hist., pp. 78-80, 111, 120, 121. 

 1860. Orthis, Shumaed. Trans. St. Louis Acad. Science, vol. i, p. 627. 



1860. Orthis, F. Rcejiee. Die silur. Fauna westlich. Tennessee, pp. 62, 63. 



1860. Orthis, Billings. Canadian Journal Science and Arts, vol. v, pp. 267, 269. 



1860. Orthis, Swallow. Trans. St. Louis Acad. Science, vol. i, p. 639. 



1860. Orthis, White. Journal Boston Society Natural History, vol. vii, p. 231. 



1861. Orthis, Hall. Fourteenth Ann. Reyit. N. Y. State Cab. Nat. Hist., pp. 89, 90. 

 1861. Orthis, McCHE.sNEy. Descriptions New Palteozoic Fossils, pp. 29, 77. 



1861. Orthis, Hall. Ann. Rept. Geology Wisconsin, pp. 42, 54, 435. 



1862. Ort?iis, Trematospira ? Hall. Fifteenth Ann. Rept. N. Y. State Cab. Nat. Hist., plate ii. 

 1862. Orthis, White and Whitfield. Proc. Boston Society Natural History, vol. viii, p. 292. 

 1862. Orthis, A. Winchell. Proc. Acad. Nat. Sci. Phila., vol. xiv, pp. 400, 409. 



1862. Orthis, Strophomena, Billings. Paleozoic Fossils, vol. i, pip. 76-79, 81-83, 130, 133, 135-137. 



1863. Orthis, Hall. Sixteenth Ann. Rept. N. Y. State Cab. Nat. Hist., pp. 32, 33. 

 1863. Orthis, Swallow. Trans. St. Loiiis Acad. Science, vol. ii, p. 81. 



1868. Orthis, Hall. Transactions Albany Institute, vol. iv, p. 209. 



1863. Ort?iis, Billings. Geology of Canada ; Report of Progress, pp. 129, 130, 165, 167-169, 210, 231, 



312, 369, 384. 



1864. Orthis, Meek. Palaeontology of California, vol. i, p. 10. 



1864. Orthis, A. Winchell. American Journal of Science, vol. xxxvii, p. 228. 



1865. Orthis, Billings. Paleozoic Fossils, vol. i, pp. 185, 217, 301, 303. 

 1865. OrtMs, A. Winchell. Proc. Acad. Nat. Sci. Phila., p. 116. 



1865. Orthis, Platystrophia, Shalbk. Bull. No. 4, Mus. Comparative Zoology, pp. 65, 67. 



1866. Orthis, Billings. Cat. Silurian Fossils Island Anticosti, pp. 12, 41. 



