SYNONYMIC REFERENCES. 31 



Present reference. 



Acrotreta gemma Walcott [1899, p. 449, PI. LXII, figs. 2a and 2c] Acrotreta idahoensis alta. 



Walcott [1899, p. 449, PL LXII, fig. 2e] Acrotreta curvata. 



Acrotreta gemma depressa Matthew [1902c, p. 109] Acrotreta depressa. 



Walcott [1889c, pp*. 441-442] Do. 



Acrotreta gemmula Matthew [1894, pp. 87-88] Acrotreta gemmula. 



Matthew [1895a, p. 126] Do. 



Matthew [1903, p. 97] Do. 



Acrotreta gracia Walcott [1902, pp. 586-587] Acrotreta gracia. 



Acrotreta? gulielmi Matthew [1886, pp. 37-39] Discinopsis gulielmi. 



Acrotreta idahoensis Walcott [1902, p. 587] Acrotreta idahoensis. 



Acrotreta cf . idahoensis Walcott [new] Acrotreta cf . idahoensis. 



Acrotreta idahoensis alta Walcott [1902, p. 588] Acrcvtreta idahoensis alta. 



Acrotreta idahoensis sulcata Walcott [1902, p. 588] Acrotreta idahoensis sulcata. 



A crotreta inchoans Pompeckj [1896a , p . 3] Acrotreta inchoaijs . 



Acrotreta inflata Walcott [1902, pp. 588-589] Acrotreta inflata. 



Acrotreta kutorgai Walcott [1902, pp. 589-590] Acrotreta kutorgai (in part) and A. rudis 



(in part). 



Acrotreta liani Walcott [1905a, p. 300] Acrotreta lisani. 



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



Acrotreta marjumensis Walcott [1908d, pp. 94-95] Acrotreta marjumensis. 



Acrotreta microscopica missouriensis Walcott [1902, p. 590] Acrotreta microscopica missouriensis. 



Acrotreta microscopica tetonensis Walcott [1902, p. 590] Acrotreta microscopica tetonensis. 



Acrotreta minuta Walcott [1901, p. 673] Linnarssonella minuta. 



Acrotreta miser Walcott [1902, pp. 590-591] .' Acrotreta misera. 



Acrotreta neboensis Walcott [1905a, pp. 300-301] Acrotreta neboensis. 



Acrotreta? nicholsoni Davidson [1868, pp. 313-314] Acrotreta nicholsoni. 



Davidson [1871, pp. 343-344] Do. 



Acrotreta nicholsoni Davidson [1883, p. 213] Do. 



Hall and Clarke [1892c, p. 103] Do. 



Swanston [1877, PL VII, figs. 21a-c] Do. 



Swanston [1886, PL VII, figs. 21a-c] Do. 



Acrotreta sp. cf . nicholsoni Matley [1902, p. 142] Acrotreta sabrinse. 



Acrotreta nox Walcott [1905a, p. 301] Acrotreta nox. 



Acrotreta oelandica Westergard [1909, p. 76] Acrotreta oelandica, 



Acrotreta ophirensis Walcott [1902, pp. 591-592] Acrotreta ophirensis. 



Acrotreta cf . ophirensis Walcott [new] Acrotreta cf . ophirensis. 



Acrotreta ophirensis descendens Walcott [1908d, p. 95] Acrotreta ophirensis descendens. 



Acrotreta ophirensis rugosus Walcott [1902, p. 592] Acrotreta ophirensis rugosa. 



Acrotreta ovalis Walcott [1902, p. 592] Acrotreta ovalis. 



Acrotreta pacifica Walcott [1905a, p . 301] Acrotreta pacifica. 



Acrotreta papellata-prima Matthew [1902b, pp. 391-392] Acrothyra sera. 



Acrotreta papillata Matthew [1902b, pp. 390-391] Do. 



Matthew [1903, p. 9-5] Do. 



Acrotreta papillata lata Matthew [1903, pp. 95-96]. .• Do. 



Acrotreta papillata-prima Matthew [1903, pp. 73-74] Do. 



Acrotreta papillata var. Matthew [1902b, p. 391] Do. 



Acrotreta parvula Walcott [1902, p . 592] Acrotreta parvula. 



Acrotreta primasea Walcott [1902, p. 593] Acrotreta primaeva. 



Acrotreta proavia Matthew [1899b, p. 203] Acrothyra proavia. 



Acrotreta pyxidicula Wliite [1874, p. 9] Acrotreta pyxidicula. 



White [1877, pp. 53-.54] Do. 



Acrotreta recm-va Kutorga [1848, pp. 277-278] Volborthia recurva. 



Acrotreta rudis Walcott [1908d, pp. 95-96] Acrotreta rudis. 



Acrotreta (?) sabrinee Matley [1902, p. 143] Acrotreta sabrinse. 



Acrotreta (?) sabrinse malvernensis Matley [1902, pp. 143-144] Do. 



(Acrotreta?) sagittalis [Obolella], Moberg and Segerberg [1906, p. 64] Acrotreta sagittalis. 



Acrotreta cf. sagittalis Walcott [new] Acrotreta cf. sagittalis. 



Acrotreta sagittalis magna Walcott [1902, pp. 595-596] Acrotreta sagittalis magna. 



Acrotreta sagittalis taconica Walcott [1902, pp. 596-597] Acrotreta sagittalis taconica. 



Acrotreta schmalenseei Walcott [1902, pp. 597-598] Acrotreta schmalenseei. 



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



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



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



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



