312 SYNOPSIS OF AMERICAN FOSSIL HRACHIOPODA. (huluST. 



Plectorthis aequivalvis (Hall) — Contiuued. 



riectorthis iLMjuivalvis Hall and Clarke, Pal. New York, VIII, Pt. I, 1892, pp. 194, 



221. 

 J.oc. Cincinnati, Ohio; Wisconsin (Whitfield). 



Plectorthis (?) aurelia (Billings). Oriskauy (Dev.). 



Orthis aurelia Billings, Pal. Fossils, II, 1874, p. 34, ])1. 3, fig. 3. 

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

 Loc. Indian Cove, Gaspo. 



Plectorthis dichotoma Hall. Lorraiue (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 (non Hall), Pal. Ohio, I, 1873, p. 10(5, pi. 8, fig. 6.— Miller, 



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

 Orthis neglecta James, The PahiMmtologist, 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., 18(J1, p. 121. 



Orthis ? ella Hall, Fifteenth Rep. Ibidem, 1862, pi. 2, iigs. 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, tig. 20.— Miller, Cin- 

 cinnati Quart. .lour. Sci., II, 1875, ji. 32, 



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

 figs. 22, 23. 



Loc. Cincinnati, Ohio. 



Plectorthis fissicosta Hall. Lorraine (Ord.). 



Orthis fissicosta Hall, Pal. New York, I, 1847, p. 121, pi. 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 Rop. N. Y. State Cub. Nat. Hist., 18G1, p. 89. — 



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



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

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

 Lnc. Cincinnati, Ohio. 



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



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



Acad. «ci., I, 1868, p. 29, pi. 9, fig. 3. 

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



pi. 5, figs. 24, 25. 

 Loc. Wilmington, Illinois; Wisconsin (Whitfield). 



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



Ortliis i)li(atena Hall, Pal. New York, I, 1847, p. 122, pi. 32, fig. 9.— Meek, Pal. 

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

 1875, p. 30. 



?Orthis plicatella Billings, (icol. Canada, 1863, p. 165, fig. 145. 



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

 pi. 5, figs. 18-20". 



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

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



Loc. Cincinnati, Ohio; Middlcvilic and Watertown, New York; Bnrgin, Ken- 

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



