32 CAMBEIAN BRACHIOPODA. 



Present reference. 



Acrotreta sipo Matthew [1902b, pp. 406-407] !Acrotreta bisecta. 



Matthew [1903, pp. 1S5-1S6] Do. 



Acrotreta socialis Gronwall [1902, p. 39] .■ Either Acrotreta schmalenseei or A. socialis. 



(See p. 712.) 



Linnarsson [1876, pp. 16-18] Acrotreta schmalenseei. 



Linnarsso-n [1877, p. 374] Either Acrotreta schmalenseei or A. soci- 

 alis. (Seep. 712.) 



von Seebach [1865, p. 341] Acrotreta socialis. 



Walcott [1902, pp. 599-600] Do. 



Wallerius [1895, p. 66] Acrotreta schmalenseei. 



Acrotreta cf. socialis Brogger [1882, pp. 46^7, PI. X, figs. 2, 2a-b] Acrotreta carinata. 



Brogger [1882, pp. 46-47, PI. X, figs. 3 and 4] Not referred in this monograph. 



Matley [1902, pp. 144-145] Acrotreta sabrinee. 



Matthew [1902b, pp. 392-394] Acrotreta sp. undt. 



Matthew [1903, pp. 183-185] ' Do. 



Acrotreta spinosa Walcott [1905a, p. 302] Acrotreta spinosa. 



Acrotreta subconica Davidson [1853, PI. IX, figs. 271-275] Acrotreta subconica. 



Kutorga [1848, p. 275] Do. 



Meek [1873, p. 463] Acrotreta attenuata (in part), A. attenuata 



var. (in part), and A. idahoensis (in part). 



Quenstedt [1885, p. 755] Acrotreta subconica. 



von Seebach [1865, p. 341] Do. 



Walcott [1902, pp. 600-601] Do. 



Acrotreta? subsidua White [1874, p. 6] ■ .• Acrothele subeidua. 



White [1S77, pp. 34-36] Do. 



Acrotreta uWchi Walcott [1908d, pp. 96-97] Acrotreta ulrichi. 



Acrotreta uplandensis Walcott [1905a, p. 302] Acrotreta uplandica. 



Acrotreta uplandica Wiman [1902, p. 54] Do. 



Acrotreta uplandica limonensis Walcott [1905a, p. 303] .Acrotreta uplandica limoensia. 



Acrotreta sp. Morris [1849, PI. VII, figs. 4a-b] Acrotreta subconica. 



Westergftrd [1909, pp. 57 and 77] Acrotreta sp. undt. 



Acrotreta (Volborthia) Oehlert [1887, p. 1266] Volborthia. 



acuminata [Glossina], Hall and Clarke [1892a, PI. I, figs. 10 and 11] Lingulella(Lingulepis) acuminata sequens.^ 



acuminata [Lingula], Billings [1863, p. 102] Lingulella (Lingulepis) acuminata. 



Chapman [1863, p. 187] Do. 



Chapman [1864, p. 159] Do. 



Conrad [1839, p. 64] Do. 



Emmons [1855, p. 203] Do. 



Hall [1847, p. 9] Do. 



acuminata [Lingula (Glossina)], Hall and Clarke [1892c, PI. I, figs.l and 2]. .Lingulella (Lingulepis) acuminata sequens. 



acuminata [Lingulepis], Dwight [1886, p. 208] Lingulella (Lingulepis) acuminata. 



Matthew [1895b, pp. 257-2.58] Do. 



Schuchert [1897, p. 2.59] Do. 



Walcott [1897a, p. 404] Do. 



acuminata meeki [Lingulepis], Delgado [1904, pp. 366-367] Lingulella delgadoi. 



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



acuminatus [Obolus (Lingulepis)], Walcott [1899, p. 443] Lingulella (Lingulepis) acuminata. 



acuminatus [Obolus (Schmidtia)], Mickwitz [1896, pp. 179-183] Obolus (Schmidtia) acuminatus. 



acuminatus alatus [Obolus (Schmidtia)], Mickwitz [1896, pp. 183-184] Do. 



acuminatus humeratua [Obolus (Schmidtia)], Mickwitz [1896, pp. 184-186]. Do. 



acuminatus meeki [Obolus (Lingulepis)], Walcott [1899, p. 444] Lingulella (Lingulepis) acuminata meeki. 



acuminatus subtriangularis [Obolus (Schmidtia)], Mickwitz [1896, pp. 



186-187] Obolus (Schmidtia) acuminatus. 



acutangula [Lingula], Roemer [1849, p. 420] •. Lingulella acutangula. 



Roemer [1852, p. 90] Do. 



acutangulus [Lingulepis], Schuchert [1897, p. 259] Do. 



acutangulus [Obolus (Lingulella)], Walcott [1898b, pp. 393 and 394, Pis. 



XXVII and XXVIII] Do. 



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



advena [Obolus?], Barrande [1879b, PI. XCV, fig. iv] Obolus? advenus. 



sequiputeis [Obolus], Matthew [1902c, p. 94] Obolus selwyni. 



Matthew [1903, p. 139] Do. 



affinis [Lingulella?], Billings [1872b, p. 468] Obolus (Lingulobolus) affinis. 



Billings [1874, p. 67] , Do. ^ ^ 



affinis [Lingulella], Billings [1882, pp. 15-16] Do. 



