444 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Dlnorthis meedsl germana (Winchell and Schuchert). 



Orthis meedsi var. germana Winchell and Schuchert, Amer. Geol., 9, 1892, p. 290. 

 Orthis (Dinorthis) meedsi var. germana Winchell and Schuchert, Geol. Minnesota, 



3, 1893, p. 428, pi. 32, figs. 43-15. 



Dinorthis meedsi germana Schuchert, Bull. IT. S. Geol. Surv., 87, 1897, p. 215. 

 Trenton (Prosser): Cannon Falls, Kenyon, and Fountain, Minnesota. 



Dinorthis pectinella (Emmons). 



Orthis pectinella Emmons, Geol. New York, Rep. 2d Dist., 1842, p. 394, fig. 2. 

 Owen, Amer. Jour. Sci. Arts, 47, 1844, p. 366, fig. 2. Hall, Pal. Xew York, 

 1, 1847, p. 123, pi. 32, fig. 10. Emmons, Amer. Geology, 1, pt. 2, 1855, p. 

 193, pi. 9, figs. 10, 11, a, b. Billings, Can. Nat. Geol., 1, 1857, p. 205, fig. 5. 

 Rogers, Geol. Pennsylvania, 2, pt. 2, 1858, p. 818, fig. 602. Emmons, Manual 

 Geology, 1860, p. 99, fig. 88. Billings, Geol. Canada, 1863, p. 165, fig. 147. 

 Hitchcock, Geol. Vermont, 1, 1862, p. 294, fig. 202. Chapman, Canadian 

 Jour., n. s., 7, 1862, p. Ill, fig. 92; ibid., 8, 1863, p. 199, fig. 184; Expos. Min., 

 Geol. Canada, 1864, p. 115, fig. 91; p. 171, fig. 183. Chamberlin, Geol. Wis- 

 consin, 1, 1883, p. 155, fig. Hall, 2d Ann. Rep. New York State Geol., 1883, 

 pi. 34, figs. 39, 40. Lesley, Geol. Surv. Pennsylvania, Rep. P 4, 1889, p. 

 59,7, figs. 



Orthis pectinella var. semiovalis Hall, Pal. New York, 1, 1847, p. 124, pi. 32, fig. 

 11. Miller, N. A. Geol. Pal., 1889, p. 359. 



Dinorthis pectinella Hall and Clarke, Pal. New York, 8, pt. 1, 1892, pp. 195, 222, 

 228, pi. 5, figs. 27-33. Weller, Geol. Surv. New Jersey, Pal., 3, 1903, p. 154, 

 pi. 9, figs. 29, 30. Grabau and Shimer, N. A. Index Fossils, 1, 1907, p. 253, 

 fig. 303i-l. Bassler, Bull. Virginia Geol. Surv., 2a, 1909, pi. 24, fig. 2. 



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

 3, 1893, p. 424, pi. 32, figs. 31-34. Whiteaves, Pal. Fossils, 3, pt. 3, 1897, 

 p. 175. 



Orthis charlotte Winchell, 8th Rep. Geol. Nat. Hist. Surv. Minnesota, 1880, p. 67. 



Upper Black River and Early Trenton: Middleville, Trenton Falls, etc., Xew 

 York; Pennsylvania; Mercer County, Kentucky; Ontario; Decorah, Iowa; 

 St. Paul, Minneapolis, and Cannon Falls, Minnesota; Lake Winnipeg, Canada; 

 Tennessee; Virginia. 



Dinorthis pectinella sweeneyi (N. H. Winchell). 



Orthis sweeneyi N. H. Winchell, 9th Rep. Geol. Nat. Hist. Surv. Minnesota, 1881, 



p. 117. 

 Dinorthis sweeneyi Hall and Clarke, Pal. New York, 8, pt. 1, 1892, pp. 196, 222, 



228, pi. 5, figs. 34-36. 

 Orthis (Dinorthis) pectinella var. sweeneyi Winchell and Schuchert, Geol. 



Minnesota, 3, 1893, p. 426, pi. 32, figs. 35-38. 

 Black River (Decorah): St. Paul, Cannon Falls, etc., Minnesota; Decorah and 



McGregor, Iowa. 



Dinorthis (Plaesiomys) platys (Billings). 



Orthis platys Billings, Canadian Nat. Geol., 4, 1859, p. 438, fig. 15; Geol. Canada, 

 1863, p. 129, fig. 54. Hall and Clarke, Pal. New York, 8, pt. 1, 1892, p. 218. 

 Winchell and Schuchert, Geol. Minnesota, 3, pt. 1, 1893, p. 424. Lesley, 

 Geol. Surv. Pennsylvania, Rep. P 4, 1889, p. 530, figs. 

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

 Plsesiomys platys Raymond, Ann. Carnegie Mus., 7, 1911, p. 238, pi. 35, figs. 13-14. 

 Chazyan: Montreal, Quebec; Crown Point, Valcour Island, and Chazy, New 

 - York (Crown Point); East Tennessee (Lenoir). 



