44 CAMBRIAN BRACHIOPODA. 



Present reference. 



Discina?sp. Kjerulf [1873, p. 83, figs. 12 and 13] Obolella (Glyptias) favosa?. 



Discina (Acrotreta?) ceratopygarum Brogger [1882, p. 47] Acrothels ceratopygarum. 



Discina (Orbicula) primseva de Vemeuil and Barrande [1860, p. 532] Acrothele primaeva. 



Discinolepis Hall and Clarke [1892a, p. 247] Discinolepis. 



Hall and Clarke [1892b, p. 563] Do. 



Hall and Clarke [1892c, p. 90] Do. 



Waagen [1885a, pp. 749-750] Do. 



Walcott [1908e, PI. XI, and pp. 142 and 146]. . . Do. 



Discinolepis granulata Hall and Clarke [1892a, p. 247] Discinolepis granulata. 



Hall and Clarke [1892b, p. 563] Do. 



Hall and Clarke [1892c, p. 90] Do. 



Waagen [1885a, pp. 750-751] Do. 



Waagen [1891, PL II, figs. 15 and 16] Do. 



Discinopsis Hall and Clarke [1892a, pp. 250-251] Discinopsis. 



Halland Clarke [1892b, pp. 566-567] Do. 



Hall and Clarke [1892c, pp. 105-106] Do. 



Walcott [1908e, PI. XI, and pp. 142 and 146] Do. 



Discinopsis gulielmi Hall and Clarke [1892a, PI. Ill, figs. 20 and 21] Discinopsis gulielmi. 



Hall and Clarke [1892c, p. 105] Do. 



Discinopsis sulcatus Walcott [1906, pp. 568-569] Discinopsis? sulcatus. 



discoida [Obolella], Hall and Whitfield [1877, p. 205] Obolus discoideus. 



discoidea [Obolella?], Hall and Clarke [1892c, p. 69] Do. 



discoidea [Obolella], Walcott [1884b, p. 14] Do. 



discoidea [Obolella?], Walcott [1886b, p. Ill] Do. 



discoideus [Obolus (Lingulella)], Walcott [1901, p. 673] Do. 



discus [Obolus], Matthew [1902c, p. 94] Lingulella triparilis. 



discus [Obolus (Eoobolus)], Matthew [1903, pp. 138-139] Do. 



dolata [Lingula], Sardeson [1896, p. 95] Obolus dolatus. 



doris [Orthis (Plectorthis)], Walcott [1905a, pp. 262-263] Eoorthis doris. 



dougaldensis [Protorthis (Loperia)], Walcott [1905a, pp, 287-288] Protorthis (Loperia) dugaldensis. 



dubia [Siphonotreta?], Walcott [new] Siphonotreta dubia. 



dubius [Obolus (Lingulella)], Walcott [1898b, p. 401] Lingulella dubia. 



edsoni [Rustella], Walcott [1905a, pp. 311-312] Rustella edsoni. 



eggegrundensis [Acrotreta], Walcott [1905a, pp. 299-300] Acrotreta eggegrundensis. 



Wiman [1902, p. 55] Do. 



eichwaldi [Obolus], Mickwitz [1896, pp. 154-155] Obolus eichwaldi. 



elegans [Obolus], Mickwitz [1896, pp. 157-158] Obolus elegans. 



elegantula [Curticia], Walcott [1905a, pp. 319-320] Curticia elegantula. 



elegantula [Strophomena (Eostrophomena)], Walcott [1905a, pp. 256-257] -Eostrophomena elegantula. 



Elkania Ford [1886b, p. 325] Elkania. 



Hall and Clarke [1892a, p. 241] Do. 



Hall and Clarke [1892b, p. 557] Do. 



Hall and Clarke [1892c, pp. 75-78] Do. 



Walcott [1905a, pp. 321-323] Elkania (in part) and Obolus (Fordinia> 



(in part). 



Walcott [1908e, PL XI, and pp. 142 and 144] Elkania. 



Elkania ambigua Ford [1886b, p. 325] Elkania ambigua. 



Hall and Clarke [1892c, p. 78] Do. 



Elkania bellula Walcott [1905a, p. 323] Obolus (Fordinia) bellulus. 



Elkania desiderata Ford [1886b, p. 325] Elkania desiderata. 



Hall and Clarke [1892a, PL III, figs. 13 and 14] Do. 



Hall and Clarke [1892c, pp. 76 and 77] Do. 



Elkania ida Ford [1886b, p. 325] Elkania ida. 



Elkania pretiosa Ford [1886b, p. 325] Acrothele pretiosa. 



ella [Lingulella], Hall and Clarke [1892c, p. 58, figs. 19 and 21] Obolus (Westonia) ella. The text includes 



also specimens representing Lingulella 

 dubia. 



Hall and Clarke [1892c, p. 58, fig. 20] Lingulella dubia. 



Pack [1906, p. 295] Obolus (Westonia) ella. 



Walcott [1886b, pp. 97-98, PL VII, fig. 2; PL VIII, figs. 4, 



4a, 4d-e] Obolus (Westonia) ella. The text includes 



also specimens representing Lingulella 

 dubia. 



