SYNONYMIC REFERENCES. 79 



Present reference. 



Orthis exporrecta Kayaer [1883, p. 35] Billingsella exporrecta, 



Wallerius [1895, p. 66] Do. 



Orthis hamburgensis Walcott [18S4b, p. 73] Eoorthis desmopleura?. 



Orthis hicksi Kayser [1883, p. 35] Billingsella hiclisi. 



Linnarsson [1876, pp. 13-14] Billingsella exporrecta rugosicostata. 



Orthis hicksii Davidson [1868, p. 314] Billingsella hicksi. 



Davidson [1869, p. 230] Do. 



Orthis? highlandensis Walcott [1886b, pp. 119-120] Billingsella highlandensis. 



Walcott [1891a, p. 612] Do. 



Orthis kuthani Pompeckj [1896b, pp. 514-515] Nisusia (Jamesella) kuthani. 



Orthis lenticularis Brogger [1882, p. 48] Orusia lenticularis. 



Davidson [1868, p. 314] Do. 



Davidson [1869, pp. 230-232] Do. 



Matthew [1892; pp. 46-48] Do. 



Matthew [1903, pp. 213-216] Do. 



Roemer [1S76, PI. II, figs. 4a-c] Do. 



Roemer [1885, pp. 33-34] Do. 



Salter [1866b, p. 339] Do. 



Salter and Etheridge [1881 , pp. 544-545] Do. 



Orthis lenticularis ? Kayser [1876, p. 9] Do. 



Orthis lenticularis atrypoides Matthew [1892, p. 48] Orusia lenticularis atrypoides. 



Matthew [1903, p. 217] Do. 



Orthis lenticularis lyncioides Matthew [1892, p. 49] Orusia lenticularis lyncioides. 



Matthew [1903, p. 216] Do. 



Orthis lenticularis strophomenoides Matthew [1892, p. 49] Orusia lenticularis. 



Matthew [1903, p. 217] Do. 



Orthis lindstromi Linnarsson [1876, pp. 10-12] Billingsella lindstromi. 



Orthis linnarssoni Kayser [1883, p. 34] Eoorthis linnarssoni. 



Orthis newtonensis Weller [1903, pp. 113-114] Eoorthis newtonensis. 



Orthis (?) peculiaris Tate [1892, pp. 185-186] Kutorgina peculiaris. 



Orthis pepina Hall [1863, pp. 134-135] Billingsella coloradoensis. 



Hall [1867, p. 113] ■ Do. 



WTiitfield [1882, pp. 170-171] Do. 



Orthis perpasta Pompeckj [1896b, pp. 515-516] Nisusia (Jamesella) perpasta. 



Orthis perpasta macra Pompeckj [lS96b, p. 516] Nisusia (Jamesella) perpasta macra. 



Orthis perpasta subquadrata Pompeckj [1896b, p. 516] Nisusia (Jamesella) perpasta subquadrata. 



Orthis primordialis Mallada [1875, p. 31] Eoorthis primordialis. 



de Verneuil and Barrande [1860, pp. 532-533] Do. 



Orthis quacoensis Matthew [1886, pp. 43^4] Protorthis quacoensis. 



Orthis? remnicha Walcott [1899, pp. 451-452, PL LXI, figs. 3 and 3a; PL 



LXII, figs. 1, Ic-d] Eoorthis remnicha. The text includes 



both E. remnicha and B. iddingsi. 



Orthis remnicha Walcott [1899, pp. 451-452, PI. LXII, figs, la-b] Eoorthis iddingsi. The text includes both 



E. iddingsi and E. remnicha. 



N. H. Winchell [1886, pp. 317-318] Eoorthis remnicha. 



Orthis romingeri Barrande [1 848, p. 203] Billingsella romingeri. 



Barrande [1879a, PL LXII, figs. II : 1^] Do. 



Feistmantel Nisusia (Jamesella) kuthani. 



Jahn Do. 



Katzer Do. 



Krejci Do. 



Kusta Do. 



Novak Do. 



Pompeckj [1896b, pp. 513-514] Billingsella romingeri. 



Wentzel Nisusia (Jamesella) kuthani. 



Orthis salemensis Oehlert [1889, p. 1 139] Billingsella salemensis. 



Walcott [1887, pp. 190-191] Do. 



Walcott [1891a, pp. 612-613] Do. 



Orthis saltensis Kayser [1876, p. 8] Eoorthis saltensis. 



Kayser [1897, p. 280] : Do. 



Orthis (?) sandbergi Walcott [1899, pp. 4.52^53] Otusia sandbergi. 



Orthis sandbergi N. H. Winchell [1886, p. 318] Do. 



