21 G SYNOPSIS OF AMERICAN FOSSIL BRACHIOPODA. [bull. 87. 



Dinorthis pectiuella (Eninions) — Continued. 



l.S5f<, p. SIS, iig. (;02.— Hillings, Geol. (';m:i(l:i, 1863, p. Ifi"), lig. 117.— I lall, 

 Sccoiul Ami Rep. New York State Geol., IS83, pi. 31, tig8.3!t,4(). 



Ortliis pectinella \ar. vsemiovalis Hall, I'al. New York, I, 1S17, i>. 121, pi. 32, iig-. 

 11.— INIillcr, N. Ameiican Oeol. TaL, 1889, p. 359. 



Ortbis cbarlotta' N. H. Winchell, Eighth Rep. Geol. Nat. Hist. Survey Minnesota, 



1880, p. G7. 



Dinorthis pectinella Hall and Clarke, Pal. New York. VTII, Pt. 1, 1892, pp. 19,-), 222, 



228, pi. 5, tigs. 27-33. 

 Orthis (Dinorthis) pectinella Winchell and Schiichcrt, Minnesota Geol. Survey, 



III, 1893, p. 424, pi. 32, figs. 31-34.— Whiteaves, Pal. Foss., Ill, Pt. III. 1897, 



p. 175. 

 Loc. Middleville, Trenton Falls, etc., New York; Pennsylvania; Mercer County, 



Kentucky; Ontario, Canada; Decorah, Iowa; St. Paul, Minneapolis, and 



Cannon Falls, JlinTiesota; Lake Winnipeg, Canada. 



Dinorthis pectinella sweeneyi K. H. Winchell. Trenton (Ord.). 



Orthis sweeneyi N. H. Winchell, Ninth Rep. Geol. Nat. Hist. Survey ^Minnesota, 



1881, p. 117. 



Dinorthis sweeneyi Hall and Clarke, Pal. New York, VIIT, Pt. 1, 1892, pp. 19G, 



222, 228, pi. 5, figs. 34-3r). 

 Orthis (Dinorthis) pectinella var. sweeneyi Wiuchell and Schuchert, Minnesota 



Geol. Survey, III, 1893, p. 426, pi. 32, figs. 35-38. 

 Loc, St. Paul, Cannon Falls, etc., INIinnesota; Decorah and McGregor, Iowa. 



Dinorthis platys (Billings). Ohazy (Ord.). 



Orthis platys l^illings, Canadian Nat. Geol., IV, 1859, p. 438, fig. 15; — Geol. 



Canada, 1863, p. 129, fig. 54.— Hall and Clarke, Pal. New York. VIII, Pt. I, 



1892, p. 218. 

 Loc. Island of ^Montreal, Canada. 



Dinorthis porcata (McCoy). Trenton and Lorraine (Ord.). 



Orthis porcata McCoy, Silurian Foss. of Ireland, 1846. p. 32, pi. 3, fig. 14. — Hil- 

 lings, Pal. Fossils, 1, 186.', p. 135, iig. Ill ;— Geol. Canada, 1863, p. 312, fig. 319. 



Orthis anticostiensis Shaler, Fossil Brachiopoda of the Ohio Valley, 1887, p. i9, 

 pi. 6. 



Pl.-esiomys porcata Hall and Clarke, Pal. New York, VIII, Pt. 1, 1892, pp. 197, 222, 

 pi. 5^, figs. 20, 21. 



Loc. Ireland; Ottawa, Canada; Anticosti. 



Dinorthis proavita Winchell and Schuchert. Lorraine (Ord.). 



Orthis proavita Winchell and Schuchert, American Geol., IX, April 1, 1892, p. 29!). 

 Orthis petra- Sardesou, Hull. Minnesota Acad. Nat. Sci., Ill, April 9, 1892, p. 332, 



pi. 5, figs. 18-21. 

 Orthis (Dinorthis) proavita Winchell and Schuchert, Minnesota Geol. Survey, 



III, 1893, p. 431, pi. 32, figs. 51-57.— ? Whiteaves, Pal. Foss., Ill, Pt. III. 



1897, p. 176. 

 Imc. Spring Valley, Minnesota; Wilmington, Illinois; Lake Winnipeg, Canada. 



Dinorthis retrorsa (Salter). Trenton and Lorraine (Ord.). 



Orthis retrorsa Salter, Mem. Geol. Survey Great Britain, II, 1858, p. 373, pi. 27, 



figs. 3, 4.— Billings, Pal. Fossils, I, 1862, p. 136, figs. 112, 113.— Meek, Pal. 



Oliio, I, 1873. p. 92, pi. 11, fig. 7.— Miller, Cincinnati Quart. .lour. Sci., II. 



1875, p. 37. 

 Orthis carleyi Hall, Thirteenth Rep. New York State Cal). Nat. Hist., 1860, p. 120, 



fig. in text;— Second Ann. Rep. New York State Geol.,- 1883, pi. 34, figs. 28, 29. 

 Ortbis kennicotti McChesuey, New Pal. Fossils, 1861, p. 78. 



