BIBLIOGRAPHIC LIST OF GENERA AND SPECIES. 883 



Orbiculoidea lamellosa— Continued. 



Trenton: Middleville, Lowville, etc., New York; Belleville and Ottawa, Ontario; 



Jacksonburg, New Jersey. 

 ? Richmond (Maquoketa) : Spring Valley, Minnesota. 



Orbiculoidea numulus Hall and Clarke. 



Orbiculoidea numulus Hall and Clarke, Pal. New York, 8, pt. 1, 1892, p. 178, 



pi. 4E, fig. 14; 48th Rep. New York State Mus., 2, 1895, p. 333, pi. 2, fig. 11; 



14th Rep. State Geol. New York for 1894, 1897, p. 333, pi. 2, fig. 11. 

 Cayugan (Manlius): Marshall, New York. 



Orbiculoidea (Schizotreta) ovalis Hall and Clarke. See Schizotreta ovalis. 



Orbiculoidea parmulata (Hall). 



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



Owen, Amer. Jour. Sci. Arts, 48, 1845, p. 300, fig. 4.— Hall, Pal. New York, 2, 



1852, pi. 4, fig. 3. 

 Discina parmulata Lincklaen, 14th Rep. New York State Cab. Nat. Hist., 1861, 



pi. 5, fig. 4. 

 Orbiculoidea parmulata Schuchert, Bull. U. S. Geol. Surv., 87, 1897, p. 281. 

 Upper Medinan: Medina and Lockport, New York. 



Orbiculoidea schucherti Swartz. 



Orbiculoidea schucherti Swartz, Maryland Geol. Surv., Low. Dev., 1913, p. 292, 



pi. 53, figs. 6. 7. 

 Helderbergian (Keyser): Dawson, Maryland. 



Orbiculoidea subplana (Hall). 



Discina tenuilamellata var. subplana Hall. Canadian Nat. Geol., 5, 1800, p. 144. — 



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

 Orbiculoidea subplana Schuchert, Bull. U. S. Geol. Surv., 87, 1897, p. 281. 

 Silurian: Arisaig, Nova Scotia. 



Orbiculoidea (Schizotreta?) tenuilamellata Hall and Clarke. See Schizotreta 

 tenuilamellata. 



Orbiculoidea tenuistriata (Ulrich). 



Discina tenuistriata Ulrich, Jour. Cincinnati Soc. Nat. Hist., 1, 187S, p. 90, pi. 4, 



fig. 10. 

 Orbiculoidea tenuistriata Schuchert, Bull. U. S. Geol. Surv., 87, p. 281. — Ruede- 



mann, Bull. New York State Mus., 1G2, 1912, p. 91, pi. 4, fig. 2. 

 Eden: Covington, Kentucky (Economy); Frankfort Gulf , New York (Frankfort). 



Orbiculoidea truncata Emmons. 



Oridculoidea truncata Emmons, Amer. Geology, 1, pt. 2, 1S55, p. 200, fig. 02. 



Trenton: Middleville, New York. 



Observation. — Not recognized. Probably a Shizotreta. 



Orbiculoidea vanuxemi (Hall). 



Discina vanuxemi Hall, Pal. New York, 3, 1859, p. 1G2, pi, 8, fig. 1. 

 Orbiculoidea vanuxemi Schuchert, Bull. U. S. Geol. Surv., 87, 1897, p. 282. 

 Cayugan (Manlius) : Manlius-square, New York. 



ORBIGNYF.LLA Ulrich and Bassler. 



Genotype: O. sublamellosa Ulrich and Bassler. 



Orbignyella Ulrich and Bassler, Smiths. Misc. Coll. (quart, issue), 47, 1904, p. 18.— 



Bassler, Bull. U. S. Geol. Surv., 292, 1906, p. 20; Bull. U. S. Nat. Mus., 77, 



1911, pp. 181, 182. 



Monticulipora (part) Ulrich, Jour. Cincinnati Soc. Nat. Hist., 5, 1882, pp. 



153, 232; Geol. Surv. Illinois, 8, 1890, pp. 370, 407. 



