442 BULLETIN 92, UXITED STATES NATIONAL MUSEUM. 



Dinobolus magniflcus (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=D. 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 WTiitfield. 



Dinobolus? parvus ^\^litfield, Geol. Wisconsin, 4, 1882, p. 347, pi. 27, figs. 8-10.— 



Winchell and Schuchert, Geol. Minnesota, 3, 1893, p. 356, fig. 27.— AMiiteaves, 



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

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



Canada. 

 Plastotype.-— Cat. No. 45548, U.S.N.M. 



DINORTHIS Hall and Clarke. Genotype: Ortliis 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, 11th 



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. 

 Ptesiomys Hall and Clarke, Pal. New York, 8, pt. 1, 1892, p. 196; 11th 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: Plgesiomys strop homenoides Raymond.) 



Dinorthis carleyi (Hall). 



Orthis retrorsa Billings (not Salter), Pal. Foss., 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. 

 Plsesiomys retrorsa Hall and Claike, 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 kennicottiMcChesncy, Now 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) tieflecta (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. 



