BIBLIOGKAPHIC LIST OF GENERA AND SPECIES. 445 



DINORTHIS PORCATA Schuchert (part). See Dinorthis (Pla^siomys) porcata aiitico- 

 stiensis. 



Dinorthis (Plsesiomys) porcata anticostiensis (Shaler). 



Orthis porcata Billings (not McCoy), Pal. Fossils, 1, Geol. Siirv. Canada, 1865, p. 

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

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



Plsesiomys porcata Hall and Clarke, Pal. New York, 8, pt. 1, 1892, pp. 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, 1887, 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. Whiteaves, Pal. Foss., Geol. Surv. Canada, 3, pt. 2, 



1895, p. 120. ?Whiteaves, 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, figs. 



3, 4. Billings, Pal. Foss., 1, Geol. Surv. 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 Ordovician: Wales (Bala); Snake Hill, Saratoga County, New York, and 



Ottawa, Ontario (Trenton). 



DINORTHIS RETRORSA Cumings. See Dinorthis carleyi. 



DINORTHIS SCOVILLEI Foerste. See Plectorthis (Austinella) scovillei. 



Dinorthis (Valcourea) strophomenoides (Raymond). 



Plsesiomys strophomenoides Raymond, Amer. Jour. Sci., 4th ser., 20, p. 370. 



Valcourea 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 Point"** East Ten- 

 nessee (Lenoir). 



Dinorthis (Plsesiomys) subquadrata (Hall). 



Orthis eubquadrata 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. Jour. Sci., 2, 1875, p. 38. White, 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. P4, 

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



?0rthis 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. 



