120 PALEONTOLOGY OF NEW YORK. 



Genera DISC IN A, Lamarck, 1819; ORBICULA, Sowerby, 1822; 

 ORBICULOIDEA, D'Orbigny, 1847; SCHIZOTRETA, Kutorga, 

 1848; ORBICULOIDEA, Davidson, 1856; D I SCI N I SC A, Dall, 

 1871; LINDSTRCEMELLA, SUB-GEN. NOV.; (EHLERTELLA, 

 SUB-GEN. NOV. ; RCEMERELLA, sub-gen. nov. ; DISCINA, of 

 authors generally. 



PLATE IV E, FIGS. 1-31 ; PLATE IV F, FIGS. 1-32; PLATE IV K, FIGS. 4,23,24. 



1S42. Orb'wula, Vandxem. Geology of New Yoi-k; Repoi-t Third District. 



1843. Orhicula, Hall. Geology of New York ; Report Fourth District. 



1847. Orhicula, Hall. Palfeontology of New York, vol. i. 



18.")2. Orhicula, Hall. Palieontology of New York, vol. ii. 



1858. Discina, Shcmard. Trans. St. Louis Academy of Science. 



1859. D'lscina, Meek and Hayden. Proceedings Philadelphia Academy Natural Science. 



1859. Discina, Hall. Palseontology of New Y'ork, vol. iii. 



1860. Discina, Shumakd. Trivns. St. Louis Academy of Science. 



1860. Discina, Hall. Thirteenth Kept. N. Y. State Cab. Nat. History. 

 1800. i)isftna, Hall. Canadian Naturalist and Geologist. 



1861. Discina, Shdmard. American Journal of Science. 



1862. Discina, Billings. Palaiozoic Fossils, vol. i. 



1862. Discina, Hall. Fifteenth Rept. N. Y. State Cal). Nat. History. 



1862. Discina, 'White. Proceedings Boston Society Natural History. 



18G3. Discina, Hall. Sixteenth Rept. N. Y. State Cab. Nat. History. 



1865. Discina, A. Winchell. Proceedings Philadelphia Academy Natural Science. 



1865. Discina, McChesney. Trans. Chicago Academy Sciences. 



1867. Discina, Hall. Palieontology of New Y'ork, vol. iv. 



1868. Discina, Hahtt. Dawson's Acadian Geology. 



1870. Discina, A. Winchell. Proceedings American Philosophical Society, vol. xii. 



1872. Discina (Orbiculoldeaf), Hall and Whiti'-ield. Twenty-fourth Rept. N. Y. State Mus. Nat. Hist. 



1872. Orhiculoidea, Meek. Rept. Palaeontology Eastern Nebraska. 



1873. Dis(ri?ta, Meek and Wohtbbn. Geological Survey of Illinois, vol. v. 



1873. Orhiculoidea, Hall. Twenty-third Rept. N. Y. State Cab. Nat. History. 



1874. Discina, Rathbon. Bulletin Buffalo Society Natural History. 



1874. Discina, Derby. Bidletin Cornell University, vol. i, No. 2. 



1875. Discina (Orhiculoidea f). Hall and Whitfield. Twenty-seventh Rept. N. Y. State Mus. Nat. 



History. 



1875. Discina {Orhiculoidea), Meek. Geological Survey of Ohio ; Palaeontology, vol. ii. 



1875. Discina, Nicholson. Rept. Palaeontology Province Ontario. 



1878. Discina, Ulricb. Journal Cincinnati Society Natural History. 



1878. Discina, Barrett. Ann. New Y'ork Academy of Sciences. 



1878. Discina, Rathbun. Proceedings Boston, Society Natuial History. 



1878. Discina, Rathbun. Bulletin ButTalo Society Natural History. 



1878. Discina, Dawson. Acadian Geology, Third Edition. 



1880. Discina, Whitfield. Annual Report Geological Survey of Wisconsin. 



1882. Discina, Whitfield. Descriptions of New Species of Fossils from Ohio. 



1882. Discina, Whitfield. Geology Wisconsin, vol. iv, pt. 3, Palajontology. 



1882. Discina, Rinooeberg. American Naturalist, September. 



