120 
PALEONTOLOGY OF NEW YORK. 
Genera DISC IN A, Lamarck, 1819; OLBICULA, Sowerby, 1822; 
ORBICULOIDEA, D’Orbigny, 1847; SCHIZOTRETA, Kutorga, 
1848; ORBICULOIDEA, Davidson, 1856; D I S C IN I S C A, Dall, 
1871; LINDSTRCEMELL A, sub-gen. nov.; CEHLERTELLA, 
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. 
1842. Orbicula, Vanuxem. Geology of New York; Report Third District. 
1843. Orbicula, Hall. Geology of New York; Report Fourth District. 
1847. Orbicula, Hall. Palaeontology of New York, vol. i. 
1852. Orbicula, Hall. Palaeontology of New York, vol. ii. 
1858. Discina, Shcmard. Trans. St. Louis Academy of Science. 
1859. Discina, Meek and Hayden. Proceedings Philadelphia Academy Natural Science. 
1859. Discina, Hall. Palaeontology of New York, vol. iii. 
1860. Discina, Shumard. Trans. St. Louis Academy of Science. 
I860. Discina, Hall. Thirteenth Rept. N. Y. State Cab. Nat. History. 
1860. Discina, Hall. Canadian Naturalist and Geologist. 
1861. Discina, Shumard. American Journal of Science. 
1862. Discina, Billings. Palaeozoic Fossils, vol. i. 
1862. Discina, Hall. Fifteenth Rept. N. Y. State Cab. Nat. History. 
1862. Discina, White. Proceedings Boston Society Natural History. 
1863. 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. 
1S67. Discina, Hall. Palaeontology of New York, vol. iv. 
1868. Discina, Hartt. Dawson’s Acadian Geology. 
1870. Discina, A. Winchell. Proceedings American Philosophical Society, vol. xii. 
1872. Discina ( Orbiculoidea ?), Hall and Whitfield. Twenty-fourth Rept. N. Y. State Mus. Nat. Hist. 
1872. Orbiculoidea, Meek. Rept. Palaeontology Eastern Nebraska. 
1873. Discina, Meek and Worthen. Geological Survey of Illinois, vol. v. 
1873. Orbiculoidea, Hall. Twenty-third Rept. N. Y. State Cab. Nat. History. 
1874. Discina, Rathbun. Bulletin Buffalo Society Natural History. 
1874. Discina, Derby. Bulletin Cornell University, vol. i, No. 2. 
1875. Discina (Orbiculoidea?), Hall and Whitfield. Twenty-seventh Rept. N. Y. State Mus. Nat. 
History. 
1875. Discina ( Orbiculoidea), Meek. Geological Survey of Ohio; Palaeontology, vol. ii. 
1875. Discina, Nicholson. Rept. Palaeontology Province Ontario. 
1878. Discina, Ulrich. Journal Cincinnati Society Natural History. 
1878. Discina, Barrett. Ann. New York Academy of Sciences. 
1878. Discina, Rathbun. Proceedings Boston Society Natural History. 
1878. Discina, Rathbun. Bulletin Buffalo 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. 
18S2. Discina, Whitfield. Geology Wisconsin, vol. iv, pt. 3, Palaeontology. 
1882. Discina, Ringueberg. American Naturalist, September. 
