426 SYNOPSIS OF AMERICAN FOSSIL BKACITIOPODA. (bull. 87. 



Stropheodonta perplana (Conrad) — Continued. 



Stiophomeua (.Strophodouta) cronistria Hall, Tontli Kcp. N. Y. State Cab. Nat. 

 Hist., 1857, p. 111. 



Stropliomena (Strophodoiita) fragilis Hall, Ibidtau, 1857, p. 143. 



Strophodouta fra<,nlis Hall, Geol. Iowa, I, Ft. TI, 1858, p. 496, pi. 3, lig. 6. 



Strophodouta perplana Hall, Pal. New York, IV, 18()7, pp. 92, 98, pi. 11, (ig. 22; 

 })\. 12, lig«. 13-15; pi. 17, lig. 1.— liathbun, Proc. Boston Soc. Nat. Hist., XX, 

 1879, p. 25.— Hall, Second Ann. Rep. N. Y. State Geol., 1883, pi. 4G, ligs. 

 2-15.— Walcott, Men. U. S. Geol. Survey, VIII, 1884, p. 120, pi. 13, lig. 11.— 

 Nettelrotli, Kentucky Fossil Shells, Mem. Kentucky Geol. Survey, 1889, p. 

 147, pi. 18, lig. 17. — Bcecher, American Jour. Sci., 3d ser., XLI, 1891, p. 357, 

 pi. 17, lig. 17.— Whiteaves, Cont. Canadian Pal., 1, 1891, p. 220. 



Stropheodonta (Leptostrophia) perplana Hall and Clarke, Pal. New York, "N'lII, 

 Pt. I, 1892, p. 288, pi. 15, figs. 2-13. 



Loe. New York; Pennsylvania; Maryland; Ohio; Indiana; Kentucky; Illinois; 

 Iowa; Wisconsin; Eureka district, Nevada; Square Lake, Maine; Ontario 

 and Peace River, Canada; Rio Maecuru and Rio Cnrua, Province of Para, 

 Brazil. 



Stropheodonta perplana nervosa Hall. Portage and Chemung (Dev.). 



Strophomona nervosa Hall, Geol. N. Y.; Rep. Fourth Dist., 1843, p. 2(5(5, fig. 1. 

 Strophodonta perplana var. nervosa Hall, Pal. New York, IV, 1867, p. 113, pi. 



19, figs. 13-16;— Second Ann. Rep. N. Y. State Geol., 1883, pL 46, fig. 17. 

 Stropheodonta perplana var. nervosa Hall and Clarke, Pal. New York, VIII, Pt. 



I, 1892, figs. 14, 15, 17. 

 Loc. Ithaca, Bath, Campbelltown, etc., New York. 



Stropheodonta perplana tuUiensis Williams. Tully (Dev.). 



Stroi>liodonta perplana var. tuUiensis Williams, Bull. Geol. Soc. America, 1, 1890, 



p. 493, pi. 12, figs. 1-4. 

 Lor. Cuyler, New York. 



Stropheodonta planulata llall. Lower Helderberg (Dev.). 



Strophodouta planulata Hall, Pal. New York, III, 1859, j.. 184, pi. 16, figs. 9-12. 

 Loc. Schoharie, Dryhill, and Litchfield, New York. 



Stropheodonta plicata Hall. Hamilton (Dev.). 



Strophodouta plicata Hall, Thirteenth Rep. N. Y. State Cab. Nat. Hist., 1860, p. 



90;— Pal. New York, IV, 1867, p. 114.— Nettelroth, Kentucky Fossil Shells, 



Mem. Kentucky Geol. Survey, 1889, p. 149. 

 Loc. Iowa City and Independence, Iowa; Thedtord, Ontario ; Falls of Ohio. 



Stropheodonta prisca Hall. Clinton (Sil.). 



stropheodonta prisca Hall, Pal. New York, II, 1852, p. (53, pi. 21, tig. 9. 

 Xoc. Kirkland, Oneida County, New York. 



Stropheodonta profunda Hall. Clinton and Niagara (Sil.). 



Lepta-na profunda Hall, Pal. New York, II, 18.52, j). i]\, pi. 21, figs. 4, 5. 



Strophomena profunda Hall, Twelfth Rep. N. Y. State Cab. Nat. Hist., 1859, 

 p. 82. 



Strophomena niagarensis Winchell and Many, Mem. Boston Soc. Nat. Hist., I, 

 1865, ]). 92, pi. 2, iig. 9. 



Strophodonta profunda Hall, Twentieth Rep. N. Y. State Cab. Nat. Hist., 1867, 

 pp. 369, 392, pi. 13, figs. 3, 4;— Twenty-eighth Rep. N. Y. State Mas. Nat. 

 Hist., 1879, p. 151, pi. 23, figs. 9, 10;— Eleventh Kep. Indiana State Geol., 

 1882, p. 289, pi. 23, figs. 9, 10; pi. 27, fig. 18;— Second Ann. Rep. N. Y. State 

 Geol., 1883, pi. 44, tigs. 1-5 (ffigs. 19. 20).— Nettelroth, Kentucky Fo»sil 

 Shells, Mem. Kentucky (Jeol. Survey, 1889, p. 148, pi. 29, fig. 26; pi. 17, figs. 

 20, 21. 



