442 BULLETIN J>2, UNITED STATES NATIONAL MUSEUM. 



Dinobolus magnificus (Billings). 



Obolus canadensis Billings (part), Geol. Surv. Canada, Rep. Prog, for 1857, 1858, 



p. 189, fig. 19 (not 20-23); Canadian Nat. Geol., 3, 1858, p. 441, fig. 19 (not 



figs. 20-23=0. canadensis). 



Obolellina magnificus Billings, ibid., n. ser., 6, 1872, p. 329, fig. 7. 

 Dinobolus magnificus Davidson and King, Quart. Jour. Geol. Soc. London, 30, 



1874, p. 164, pi. 19, fig. 8. Nicholson, Pal. Prov. Ontario, 1875, p. 17, fig. 6. 

 Black River (Leray): Pauquette's Rapids, etc., Canada. 



Dinobolus(?) parvus Whitfield. 



Dinobolus? parvus Whitfield, Geol. Wisconsin, 4, 1882, p. 347, pi. 27, figs. 8-10. 



Winchell and Schuchert, Geol. Minnesota, 3, 1893, p. 356, fig. 27. Whit eaves, 



Pal. Foss., 3, pt. 3, 1897, p. 166. 

 Trenton: WTritewater, Wisconsin; Wykoff, Minnesota (Prosser); Lake Winnipeg, 



Canada. 

 Plastotype.C&t. No. 45548, U.S.N.M. 



DINORTHIS Hall and Clarke. Genotype: Orthis pectinella Emmons. 



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



and Schuchert, Geol. Minnesota, 3, 1893, p. 420 Hall and Clarke, llth 



Ann. Rep. New York State Geol., 1894, p. 266. Grabau and Shimer, N. A. 



Index Fossils, 1, 1907, p. 252. Cumings, 32d Ann. Rep. Dep. Geol. and 



Nat. Res. Indiana, 1908, p. 888. Schuchert, Zittel-Eastman Textb. Pal., 



1913, p. 382. 

 Plsesiomys Hall and Clarke, Pal. New York, 8, pt. 1, 1892, p. 196; llth Ann. 



Rep. New York State Geol., 1894, p. 266. Schuchert, Zittel Textb. Pal., 1913, 



p. 382. (Genotype: Orthis subquadrata Hall.) 

 Valcourea(subgenus of Plsesiomys) Raymond, Ann. Carnegie Mus., 7, 1911, p. 239, 



(Genotype: Plsesiomys strophomenoides Raymond.) 



Dinorthis carleyi (Hall). 



Orthis retrorsa Billings (not Salter), Pal. FOBS., 1, Geol. Surv. Canada, 1865, p. 136, 



fig. 113 (adv. sheets, 1862) (not fig.. 112=D. retrorsa). Meek, Pal. Ohio, 1, 



1873, p. 92, pi. 11, fig. 7. Miller, Cincinnati Quart. Jour. Sci., 2, 1875, p. 



37. Lesley, Geol. Surv. Pennsylvania, Rep. P 4, 1889, p. 532, figs. Mc- 



Creery, Amer. Geol. 5, 1890, p. 102. 

 Plaesiomys retrorsa Hall and Clarke, Pal. New York, 8, pt. 1, 1892, pp. 197, 222; 



pi. 5A, figs. 14-16. 

 Dinorthis retrorsa Cumings, 32d Ann. Rep. Dep. Geol. Nat. Res. Indiana, 1908, 



p. 902, pi. 33, figs. 7-7d. Foerste, Amer. Geol., 31, 1903, p. 335 (loc. occ.). 

 Orthis carleyi Hall, 13th Rep. New York State Cab. Nat. Hist., 1860, p. 120, fig.; 



2d Ann. Rep. New York State Geol., 1883, pi. 34, figs. 28, 29. 

 Dinorthis carleyi Foerste, Ohio Nat., 12, No. 3, 1912, p. 453, pi. 22, fig. 8. 

 Orthis kennicotti McChesney, New Pal. Fossils, 1861, p. 78. 

 Richmond (Arnheim): Oxford, etc., Ohio; Indiana; Kentucky; Tennessee. 



Dinorthis carleyi insolens Foerste. 



Dinorthis carleyi-insolens Foerste, Bull. Sci. Lab. Denison Univ., 14, 1909, p. 



320, pi. 7, fig. 9. 

 Richmond ( Waynesville) : Miltonville, etc., Ohio; Indiana. 



Dinorthis (Valcourea) deflecta (Conrad). 



Strophomena deflecta Conrad, Proc. Acad. Nat. Sci. Philadelphia, 1, 1843, p. 

 332. Hall, 12th Rep. New York State Cab. Nat. Hist., 1859, p. 70. Emmons, 

 Amer. Geology, 1, pt. 2, 1855, p. 198. 



