90 ■ CAMBRIAN BRACHIOPODA. 



Present reference. 



(Schmidtia) celatus [Obolus], Mickwitz [1896, pp. 159-163] Obolus (Schmidtia) celatus. 



(Schmidtia) celatus orbiculatus [Obolus], Mickwitz [1896, pp. 163-165] Do. 



(Schmidtia) celatus prascisus [Obolus], Mickwitz [1896, pp. 166-167] Do. 



Schmidtia?? complexus Mickwitz [1896, pp. 19-20] Obolus compiexus. 



(Schmidtia) crassus [Obolus], Mickwitz [1896, pp. 187-193] Obolus (Schmidtia) crassus. 



(Schmidtia) crassus angulatus [Obolus], Mickwitz [1896, pp. 193-194] Do. 



(Schmidtia) obtusus [Obolus], Mickwitz [1896, pp. 167-171] Obolus (Schmidtia) obtusus. 



(Schmidtia) obtusus acutus [Obolus], Mickwitz [1896, pp. 172-173] Do. 



(Schmidtia) obtusus ellipticus [Obolus], Mickwitz [1896, pp. 177-178] Do. 



(Schmidtia) obtusus extenuatus [Obolus], Mickwitz [1896, pp. 178-179] Do. 



(Schmidtia) obtusus latus [Obolus], Mickwitz [1896, pp. 174-175] Do. 



(Schmidtia) obtusus longus [Obolus], Mickwitz [1896, pp. 171-172] Do. 



(Schmidtia) obtusus minutus [Obolus], Mickwitz [1896, pp. 175-177] Do. 



schucherti [Obolus (Lingulella)], Walcott [1901, pp. 689-690] Lingulella schucherti. 



Schuchertina Walcott [1905a, p. 323] Schuchertina. 



Walcott [1908e, PI. XI, and pp. 142 and 145] Do. 



Schuchertina cambria Walcott [1905a, pp. 323-324] Schuchertina cambria. 



scotica [Micromitra], Walcott [new] Micromitra scotica. 



sculpta [Aulonotreta], Dall [1877, p. 16] Obolus (Acritis) antiquissimus. 



Kutorga [1848, pp. 282-283] Do. 



sculptilis [Iphidea (??)], Meek [1873, p. 479] Micromitra sculptilis. 



eculptilis [Iphidea], Schuchert [1897, p. 235] Do. 



Walcott [1899, pp. 447^148] Do. 



sculptilis [Iphidella], Walcott [1905a, p. 308] Do. 



sculptilis [Kutorgina], Walcott [1884b, p. 20] Do. 



sculptilis endlichi [Micromitra], Walcott [1908d, p. 56] Micromitra sculptilis endlichi. 



seebachi [Acrotreta], Moberg and Segerberg [1906, pp. 66-67] Acrotreta seebachi. 



Walcott [1902, pp. 598-599] Do. 



selwyni [Lingulella], Matthew [1895b, pp. 255-256] Obolus selwyni. 



Matthew [1903, pp. 62-63] Do. 



Matthew [1903, pp. 116-123] Do. 



septalis [Obolus (Lingulella)], Walcott [1905a, p. 331] Obolus septalis. 



sequens [Lingulella (Lingulepis) acuminata], Walcott [1908d, p. 72] Lingulella (Lingulepis) acuminata sequena. 



sera [Acrothyra (signata)], Matthew [1902b, pp. 383-384] Acrothyra sera. 



sera [Acrothyra signata], Matthew [1903, p. 56] Do. 



Matthew [1903, pp. 87-88] .■ Do. 



shantungensis [Acrotreta], Walcott [1905a, pp. 301-302] Acrotreta shantungensis. 



shelbyeusis [Wimanella], Walcott [1908d, p. 100] Wimanella shelbyensis. 



shensiensis [Obolus], Walcott [1905a, p. 327] Obolus ehansiensis. 



siemiradzkii [Obolus (Lingulella)], Walcott [1901, pp. 690-691] Lingulella siemiradzkii. 



signalis [Acrotreta], Walcott [1902, p. 599] Acrotreta signalis. 



signata [Acrothyra], Matthew [1902b, pp. 381-382] Acrothyra signata. 



Matthew [1903, p. 87] Do. 



signata [Lingula?], Barrande [1868a, p. 103] Lingulella signata. 



Barrande [1868b, p. 692] Do. 



signata orta [Acrothyra], Matthew [1902b, pp. 385-386] •. Acrothyra signata orta. 



Matthew [1903, pp. 89-90] Do. 



signata prima [Acrothyra], Matthew [1902b, pp. 382-383] Acrothyra signata prima. 



Matthew [1903, p. 73] Do. 



(signata) sera [Acrothyra], Matthew [1902b, pp. 383-384] Acrothyra sera. 



signata sera [Acrothyra], Matthew [1903, p. 56] Do. 



Matthew [1903, pp. 87-88] Do. 



signata tarda [Acrothyra], Matthew [1902b, pp. 384-385] Do. 



Matthew [1903, p. 89] Do. 



siluricus [Obolus], Eichwald [1843a, pp. 7-8] Obolus (Mickwitzella) siluricus. 



Eichwald [1859, PL XXXVII, figs. 6 and 7a-b] Do. 



Eichwald [I860, pp. 927-928] Do. 



Mickwitz [1892, p. 60] Do. 



Schmidt [1861, p. 218] Do. 



Schmidt [1881, p. 17] Do. 



Siemiradzki [1886, p. 672] Obolus (Acritis) antiquissimus. 



siluricus [Obolus (Thysanotos)], Mickwitz [1896, pp. 195-199] Obolus (Mickwitzella) siluricus. 



similis [Obolus (Lingulella)], Walcott [1898b, pp. 415-416] Lingulella similis. 



simplex [Lingula], Barrande [1879b, PL CIV, figs, vi : 1-1] Lingulella? simplex. 



