BIBLIOGRAPHIC LIST OF GENERA AND tiPECIES. 445 



DiNORTHis roRCATA Schuchert (part). See Dinorthie (PhesiomyH) porcata aiitico- 

 etiensis. 



DInorthls (Plseslomys) porcata antlcostlensis (Shaler). 



Orthis porcata Billings (not McCoy), Pal. Fossili^, 1, Geol. Surv. Canada, 1865, p. 

 1.35, fig. Ill (adv. sheets); Geol. Canada, 1863, p. 312, lig. 319.— Lesley, Geol. 

 Surv. Pennsylvania, Rep. P 4, 1889, p. 531, figs. 



Plsesiomys porcata Hall and Clarke, Pal. New York, 8, pt. 1, 1892, p{). 197, 22, pi. 

 5A, figs. 20, 21. 



Dinorthis porcata Schuchert (part). Bull. U. S. Geol. Surv., 87, 1897, p. 216. 



Orthis anticostiensis Shaler, Fossil Brach. of the Ohio Valley, 1SS7, p. 19, pi. 6. 



Richmond: English Head, etc., Anticosti (Ellis Bay); Stony Mountain, Mani- 

 toba Stony Mountain). 



Dinorthis proavita (Winchell and Schuchert). 



Orthis proavita Winchell and Schuchert, Amer. Geol., 9, April 1, 1892, p. 290. 

 Orthis petrae Sardeson, Bull. Minnesota Acad. Nat. Sci., 3, April 9, 1892, p. 332, 



pi. 5, figs. 18-21. 

 Orthis (Dinorthis) proavita Winchell and Schuchert, Geol. Minnesota, 3, 1893, p. 



431, pi. 32, figs. 51-57.— WTiiteaves, Pal. Foss., Geol. Surv. Canada, 3, pt. 2, 



1895, p. 120.— ?^^^liteaves, Pal. Foss, 3, pt. 3, 1897, p. 176. 

 Dinorthis proavita Schuchert, Bull. U. S. Geol. Surv., 87, 1897, p. 216. 

 Richmond: Spring Valley, Minnesota; Wilmington, Illinois; Lake Winnipeg, 



Manitoba; Texas; etc. 



Dinorthis (Plaesiomys) retrorsa (Salter). 



Orthis retrorsa Salter, Mem. Geol. Surv. Great Britain, 2, 1858, p. 373, pi. 27, fio^s. 



3, 4.— Billings, Pal. Foss., 1, Geol. Sirrv. Canada, 1865, p. 136, fig. 112 (not 



113=D. carleyi) (adv. sheets, 1862). 

 Plsesiomys retrorsa Ruedemann, Bull. New York State Mus., 162, 1912, p. 93, pi. 4, 



figs. 9-12. 

 Middle Ordo\ician: Wales (Bala); Snake Hill, Saratoga County, New York, and 



Ottawa, Ontario (Trenton). 



Dinorthis retrorsa Cunaings. See Dinorthis carleyi. 



Dinorthis scovillei Foerste. See Plectorthis (Austinella) scovillei. 



Dinorthis (Vaicourea) strophoinenoides (Raymond). 



Pla;siomys strophomenoides Raymond, Amer. Jour. Sci., 4th ser., 20, p. 370. 



Vaicourea strophomenoides Raymond, Ann. Carnegie Mus., 7, 1911, p. 240, pi. 35, 

 figs. 15-19; pi. 36, fig. 1, text fig. 12. 



Chazyan: Valcour Island and Plattsburg, New York (Crown Points- East Ten- 

 nessee (Lenoir). 



Dinorthis (Plaesiomys) subquadrata (Hall). 



Orthis subquadrata Hall, Pal. New York, 1, 1847, p. 126, pi. 32A, fig. 1; Geol. 

 Wisconsin, 1, 1862, p. 54, figs. 1, 2.— Meek, Pal. Ohio, 1, 1873, p. 94, pi. 9, 

 fig. 2.— Miller, Cincinnati Quart. Jom-. Sci., 2, 1875, p. 38.— V^Tiite, 2d Ann. 

 Rep. Indiana Bureau Stat. Geol., 1880, p. 484, pi. 1, figs. 3-5; 10th Rep. 

 State Geol. Indiana, 1881, p. 116, pi. 1, figs. 3-5.— Shaler, Foss. Brach. of the 

 Ohio Valley, 1876, p. 22, pi. 7.— Lesley, Geol. Surv. Pennsylvania, Rep. P 4, 

 1889, p. 535, figs.— Keyes, Geol. Surv. Missouri, 5, 1895, p. 60. 



?Orthis subquadrata Billings, Geol. Canada, 1863, p. 165, fig. 146. 



Platystrophia subquadrata Hall, 36th Rep. New York State Mus. Nat. Hist., 1884, 

 p. 75, pi. 3, fig. 4. 



