312 SYNOPSIS OF AMERICAN FOSSIL BRACHIOPODA. Tbull-ST. 



Plectorthis gequivalvis (Hall) — Coiitiuued. 



Plectorthis tcquivalvie Hall and Clarke, Pal. New York, VIII, ^t. 1, 1892, pp. 194, 



221. 

 Loc. Cincinnati, Ohio; Wisconsin (Whitfield). 



Plectorthis (?) aurelia (Billiugs). Oriskany (Dev.). 



Orthis aurelia Billings, Pal. I'ossils, II, 1874, p. 34, pi. 3, tig. 3. 

 Plectorthis ? aurelia Hall and Clarke, Pal. New York, VIII, Pt. I, 1892, p. 221. 

 T.oc. Indian Cove, Casp6. 



Plectorthis dichotoma Hall. Lorraine (Ord.). 



Orthis dichotoma Hall, Pal. New York, I, 1847, p. 125, pi. 32, fig. 13. —Miller, 



American Pal. Fossils, 1877, p. 117. 

 Orthis fissicosta Meek (uon Hall), Pal. Ohio, I, 1873, p. 106, pi. 8, fig. 6.— Miller, 



Cincinnati Quart. Jour. Sci., II, 1875, p. 30. 

 Orthis neglecta James, The Palicontologist, 4, 1879, p. 26. 

 Plectorthis dichotoma Hall and Clarke, Pal. New York, VIII, Pt. I, 1892, p. 221, 



pi. 5, fig. 21. 

 Loc. Cincinnati, Ohio. 



Plectorthis ella Hall. Lorraine (Ord.). 



Orthis ella Hall, Thirteenth Rep. N. Y. State Cab. Nat. Hist., 1861, p. 121. 



Orthis ? ella Hall, Fifteenth Rep. Ibidem, 1862, pi. 2, figs. 6-8 ;— Twenty-fourth 

 Rep. Ibidem, 1872, pi. 7, lig. 21.— Meek, Pal. Ohio, I, 1873, p. 105, pi. 8, fig. 

 9.— Hall and Whitfield, Ibidem, II, 1875, p. 76, pi. 1, fig. 20.— Miller, Cin- 

 cinnati Quart. Jour. Sci., II, 1875, p. 32, 



Plectorthis ? ella Hall and Clarke, Pal. New York, VIII, Pt. I, 1892, p. 221, pl. 5, 

 figs. 22, 23. 



Loc. Cincinnati, Ohio. 



Plectorthis fissicosta Hall. Lorraine (Ord.). 



Orthis iissicosta Hall, Pal. New York, I, 1847, p. 121, pl. 32, fig. 7. 

 Plectorthis fissicosta Hall and Clarke, Pal. New York, VIII, Pt. I, 1892, pp. 



194, 221. 

 Loc. Cincinnati, Ohio. 



Plectorthis jamesi Hall. Lorraine (Ord.). 



Orthis jamesi Hall, Fourteenth Rep. N, Y. State Cab. Nat. Hist., 1861, p. 89. — 



Miller, Cincinnati Quart. Jour. Sci., II, 1875, p. 33. — Hall and Whitfield, 



Pal. Ohio, II, 1875, p. 77, pl. 1, figs. 21, 22. 

 Plectorthis jamesi Hal! and Clarke, Pal. New York, VIII, Pt. 1, 1892, pp. 194, 221. 

 Loc. Cincinnati, Ohio. 



Plectorthis kankakiensis (McChesney). Lorraine (Ord.). 



Orthis kankakensis McChesney, New Pal. Fossils, 1861, p. 77; — Trans. Chicago 



Acad. Sci., 1, 1868, p. 29, pl. 9, fig. 3. 

 Plectorthis kankakensis Hall and Clarke, Pal. New York, VIII, Pt. 1, 1892, p. 221, 



pl. 5, figs. 24, 25. 

 L.oc. Wilmington, Illinois; Wisconsin (Whitfield). 



Plectorthis plicatella Hall. Trenton-Lorraine (Ord.). 



Ortliis plicatella Hall, Pal. New York, I, 1847, p. 122, pl. 32, fig. 9.— Meek, Pal. 

 Ohio, I, 1873, p. 108, pl. 8, fig. 7.— Miller, Cincinnati Quart. Jonr. Sci., II, 

 1875, p. 30. 



fOrthis i>licatella Billings, Geol. Canada, 1863, p. 165, fig. 145. 



Plectorthis plicatella Hall and Clarke, Pal. New York, VIII, Pt. I, 1892, p. 221, 

 pl. 5, figs. 18-20. 



Orthis (Plectorthis) plicatella Winchell and Schuchert, Minnesota Geol. Sur- 

 vey, III, 1893, p. 436, pl. 33, figs. 5-7. 



Loc. Cincinnati, Ohio; Middleville and Watertowu, New York; Burgiu, Ken- 

 tucky; Cannon Falls, Keuyou, etc., Minnesota; Wisconsin. 



