422 SYNOPSIS OF AMERICAN FOSSIL BRACHIOPODA. [bull. 87, 



Stropheodonta erratica A. Wiucliell. flamilton (Dev.). 



StropLodoiita erratica and A'arieties solidicosta and fissicosta A. WinrUell, Rep. 



Lower Peninsula Michigan. 1866, p. 93. 

 Loc. Grand Traverse region, Michigan. 

 Obs. This species may prove to be only a local variation of S. costata Owen. 



Stropbeodonta feildeni Etlieridge. *? Lower Devonian. 



StTophodouta feildeni Etheridge, Quart, .lour. Geol. Soc. London, XXXIV, 1878, 



p. 598, pi. 25, fig. 4. 

 Loc. Cape Hilgard, lat. 79^ 41'. 

 Obs. Since this species is very closely related to S. magnifica of the Oriskany 



sandstone the horizon is prohahly Lower Devonian. 



Stropheodonta galatea (Billings). Lower Devonian. 



Strophomena galatea Billings, Pal. Fossils, II, 1874, p. 20, fig. 9. 

 loc. Indian Cove, Gasp^, Canada. 



Stropheodonta (?) geniculata (Slialer). Anticosti (Sil.). 



Brachyprion geniculatum Shaler, Bull. Mus. Comp. Zool., 4, 1865, p. 63. 

 Loc. Near Southwest Point, Anticosti. 



Stropheodonta (?) gilpeni (Dawson). Upper Arisaig (Sil.). 



Strophomena gilpeni Dawson, Canadian Nat. Geol., n. ser., IX, 1880, p. 341. 

 Loc. Nova Scotia, Canada. 



Stropheodonta hemispherica Hall. Upper H elderberg (Dev.) 



strophomena (Strophodonta) hemispherica Hall, Tenth Rep. N. Y. State Cab. 

 Nat. Hist., 1857, p. 113. 



Strophodonta hemispherica Hall, Pal. New York, IV, 1867, p. 90, pi. 13, figs. 12, 

 13;— Second Ann. Rep. N. Y. State Geol., 1883, pi. 45, fig. 23.— Nettelroth, Ken- 

 tucky Fossil Shells, Mem. Kentucky Geol. Survey, 1889, p. 144, pi. 18, figs. 4-G. 



Loc. New York; Ohio; Indiana; Kontucky; Ontario. 



Stropheodonta insequiradiata Hall. Upper Helderberg (Dev.). 



Strophomena (Strophodonta) inaiquiradiata Hall, Tenth Rep. N. Y. State Cab, 

 Nat. Hist., 1857, p. 113, figs. 1-3. 



Strophomena insequistriata Billings, Canadian Jour. Sci. Arts, YI, 1861, p. 338, 

 fig. 113 ;— Geol. Canada,1863, p. 367, fig. 375 ;— Pal. Fossils, 11,1874, ]). 24, fig.l3 ; 

 pi. 2, fig. 4; p. 240. 



Strophodonta in.iequiradiata Hall, Pal. New York, IV, 1867, p. 87, pi. 11, figs. 24-31 ; 

 pi. 12, fig. 12; pi. 13, figs. 6-11 ;— Second Ann. Rep. N. Y. State Geol., 1883, pi. 45, 

 figs. 13, 14.— Walcott, Mon. U. S. Geol. Survey, VIII, 1884, p. 120, pi. 11, fig. 11. 



Stropheodonta intequiradiata Hall and Clarke, Pal. New York, VIII, Pt. 1, 1892, 

 pi. 14, figs. 13, 14. 



Loc. Albany and Schoharie counties. New York; Columbus, Ohio; Eureka dis- 

 trict, Nevada; Gasp^ Bay, Canada, 



Stropheodonta inseqnistriata (Conrad). Corniferons to Hamilton (Dev.), 



Strophomena inrequistriata Conrad, Jour. Acad. Nat. Sci. Philadelphia, VIII, 1842, 

 p. 254, pi. 14, fig. 2,— Hall, Geol. N. Y. ; Rep. Fourth Dist., 1843, p. 200, fig. 4.— 

 Billings, Canadian Jour. Sci. Arts, VI, 1861, p. 338, figs. 113, 114;— Geol, Can- 

 ada, 1863, p. 367. fig. 375. 



Strophomena (Strophodonta) inseqnistriata Hall, Tenth Rep. N. Y. State Cab, 

 Nat. Hist., 1857, p. 142. 



Strophodonta innequistriata Hall, Pal. New York, IV, 1867, p. 93, pi. 12, figs. 6-8; 

 p. 106, pi. 18, fig. 2 ;— Second Ann. Rep. N. Y. State Geol., 1883, pi. 45, figs. 1-6.— 

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

 145, pi. 17, figs, 10, 11, 



