sdHDCHKET.] INDEX AND BIBLIOGRAPHY. 281 



Orbiculoidea numulus Hall and Clarke. Waterlime (Sil.). 



Orbiculoidea numulus Hall and Clarke, Pal. New York, VIII, Pt. I, 1892, p. 178, 



pi. 4E, fig. 14. 

 Loc. Marshall, New York. 



Orbiculoidea parmulata (Hall). Medina (Sil.). 



Orbicula parmulata Hall, Geol. New York ; Rep. Fourtli Dist., 1843, p. 48, fig. 4 ; — 



Pal. New York, II, 1852, pi. 4, fig. 3. 

 Loc. Medina and Lockport, New York. 



Orbiculoidea patellaris (A. Wincliell). Kinderhook (L. Carb.). 



Discina patellaris A. Wincbell, Proc. Acad. Nat. Sci. Philadelphia, 1863, p. 4. 

 Loc Burlington, Iowa. 



Orbiculoidea ])leurites Meek=Linj?ulodisciua pleurites. 

 Orbiculoidea pulchra Hall=Orbiculoidea hertzeri. 



Orbiculoidea randalli Hall. Hamiltou (Dev.). 



Discina randalli Hall, Sixteenth Rep. N. Y. State Cab. Nat. Hist., 1863, p. 25; — 



Pal. Now York, IV, 1867, p. 18, pi. 2, fig. 34. 

 Orbiculoidea randalli Hall and Clarke, Pal. New York, VIII, Pt. I, 1892, pi. 4E, 



fig. 18. 

 Loc. Schoharie, New York. 



Orbiculoidea saffordi (A. Wiuchell). Lower Carboniferous. 



Discina saffordi A. Winchell, Geol. Tennessee, 1869, p. 443; — Proc. American 



Philosophical Soc, Xll, 1870, p. 248. 

 Loc. "Just above Black Slate," Hickman County, Tennessee. 



Orbiculoidea sampsoni (Miller). Chouteau (L. Carb.). 



Discina sampsoni Miller, Seventeenth Rep. State Geol. Indiana, 1891, p. 80, pi. 



13, figs. 10-12. 

 Loc. Sedalia, Missouri. 



Orbiculoidea seneca (Hall). Hamilton (Dev.). 



Discina seneca Hall, Sixteenth Rep. N. Y. State Cab. Nat. Hist., 1863, p. 26;— 



Pal. New York, IV, 1867, p. 20, pi. 2, figs. 23, 24. 

 Loc. East shore of Seneca Lake, New York. 



Orbiculoidea subplana (Hall). Arisaig (Sil.). 



Discina tenuilamellata var. subplana Hall, Canadian Nat. Geol., V, 1860, p. 144. — 



Dawson, Acadian Geol., 3d ed., 1878, p. 595. 

 Loc. Arisaig, Nova Scotia. 



Orbiculoidea subtrigonalis (McCbesney). Upper Carboniferous. 



Discina subtrigonalis McChesney, New Pal. Fossils, 1865, p. 97. 

 Discina trigonalis McChesney, Ibidem, 1865, pi. 2, fig. 19; — Trans. Chicago Acad. 



Sci., 1, 1868, p. 24, pi. 2, fig. 19. 

 Loc. Lasalle, Illinois. 



Orbiculoidea tenuilineata (Meek and Hayden). Upper Carboniferous. 



Discina tenuilineata Meek and Hayden, Proc. Acad. Nat. Sci. Philadelphia, 1859, 



p. 25. 

 Loc. Cottonwood Creek, Kansas. 



Orbiculoidea tenuistriata (Ulricb). Utica (Ord.). 



Discina tenuistriata Ulrich, Jour. Cincinnati Soc. Nat, Hist., I, 1878, p. 96, pi. 4, 



fig. 10. 

 Loc. Covington, Kentucky. 



