BRACHIOPODA. 187 



1842. Delthyrh (partim), Conrad. Jouvn. Acad. Nat. Sci., Philadelphia, vol. viii, pp. 200, 202. 



1843. iSpiri/er, Castelnaii. Essai sur le Syat. Sil. de rAineriiiue septentrionale, p. 42. 



1843. 0)i!iis, /Stropliome'iia, Conhad. Proc. Acad. Nat. Sci., Philadcliihia, vol. i, pp. 133, 332, 333. 



1843. Orthis. nilthijrU, Atri/paf Hall. Geolog-y of N. Y. ; Kept. Fourth Dist., pji. 70, 71, lO.n, IV.'i, 21o, 



267, 271. 



1844. (h-tJils, Delthyrls (partim), Owen. Hojit. Geol. Expl. Iowa, Wisconsin and Illinois, plates xii, 



xiv, XV, xvii. 



184.5. OrHih, Hall. American Joni'nal of Science, vol. xlviii, p. 294. 



184(5. Ortliis, McCoy. Synop.sis Silurian Fossils Ireland, p. 32. 



1847. Orthis, DeWiyri.i, Lrptwva, Hall. Pala^mtology of N. Y., vol. i, i.p. 20, 113, 117, IHO, 288, 289. 



1847. Orthis, Yandbll and Shumahd. Contribution Geolog-y Kentucky, p. 21. 



18.'')2. Orthis, Owen. Rept. Geol. Sui'v. Wisconsin, Iowa and Minnesota, p. 585. 



I8.")2. Ortkis, t^pirifer. Hall. Palaeontology of N. Y,, vol. ii, pp. 56-58. 65, 252-255, 260. 



[?] 1855. Orthis, Shumard. Rept. Geol. Surv. Missouri, ji. 205. 



1856. Orthis, Billings. Canadiiin Naturalist and Geolog-ist, vol. i, pp. 40, 134, 13t), 205, 206. 

 1S.')7. Orthis, Hall. Tenth Ann. Rept N. Y. State Cab. Nat. Hist., pp. 41-46, 102, 110, 135. 



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



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

 18i58. Orthis, Maecou. Geology of North America, 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, DeUhyris, Rogers. Geolog-y of Penn., vol. ii, part 2, pp. 818, 820. 



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



185il. Orthis, Billings. Hind's Expl. Assiniboine, Saskatchawan, etc., p. Iil3. 



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

 1859. Orthis, Salter. Canadian Oi-ganic Remains, Decade i, p. 39. 



1859. Orthi.'i, Hall. PaL-eontology of N. Y., vol. iii, pp. 1G2-172, 174-176, 179, 409, 481. 



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



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

 1860. Orthis, Sir'mard. Trans. St. Louis Acad. Science, vol. i, p. 627. 



1860. Orthis, F. Rqsmer. 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. Rejit. N. Y. State Cab. Nat. Hist., pp. 89, 90. 

 1861. Orthis, McChesnby. Descriptions New Palisozoic Fossils, pp. 29, 77. 



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



1862. Orttiis, Trematospira f Hall. Fifteenth Ann._ Rept. N. Y. State Cab. Nat. Hist., plate ii. 

 1862. Orthis, White and AVhitfield. Proc. Boston Society Nalui-al History, vol. viii, p. 292. 

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



1862. Orthis, Strophomena, Billings. Palaeozoic Fossils, vol. i, iip. 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. Ti'ans. St. Louis Acad. Science, vol. ii, \i. 81. 



1863. Orthis, Hall. Transactions Albajiy Institute, vol. iv, p. 209. 



1863. Orthis, BiLLiN(iS. Geology of Canada ; Report of Progress, p)). 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. Palaeozoic Fossils, vol. i, pp. 185, 217, 301, 303. 

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



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



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



