96 CAMBRIAN BEACHIOPODA. 



Present reference. 

 Unguliten von Buch [1841, p. 7] i Obolus. 



Pander [1830, pp. 55-58] Do. 



Quenstedt [1837, pp. 143-145] Do. 



Ungulites Quenstedt [1885, p. 756] Do. 



Ungulites apoUinis Quenstedt [1885, pp. 755 and 756] Obolus apoUinis. 



Ungulites sp. Quenstedt [1837, pp. 143-145] Obolus apoUinis quenstedti. 



unxia [Syntrophia?], Walcott [1908d, pp. 108-109] Syntrophia? unxia. 



upis [Obolus (Lingulella)], Walcott [1905a, pp. 331-332] Lingulella upis. 



uplandensis [Acrotreta], Walcott [1905a, p. 802] Acrotreta uplandica. 



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



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



urania [Linnarssonella], Walcott [1908d, pp. 92-93] Linnarssonella urania. 



utahensis [Iphidella labradorica], Walcott [1905a, p. 306] Micromitra (Paterina) labradorica utahen- 



sis. 



utahensis [Nisusia (Jamesella)], Walcott [1905a, pp. 255-256] Nisusia (Jamesella) utahensis. 



utahensis [Otusia], Walcott [new] Otusia utahensis. 



Y. 



varians [Discina], Barrande [1868a, pp. 103-104] Orbiculoidea varians. 



Barrande [1868b, p. 692] Do. 



Pompeckj [1896a, p. 4] Do. 



vaticina [Orthisina], Mallada [1875, p . 32] Nisusia? vaticina. 



de Verneuil and Barrande [1860, pp. 533-535] Do. 



ventrosus [Obolus (Acritis) antiquissimus], Mickwitz [1896, pp. 213-214]. .Obolus (Acritis) antiquissimus. 



vermilionensis [Obolella], Walcott [new] Obolella vermilionensis. 



vermontana [Huenella], Walcott [new] Huenella vermontana. 



verrucosa [Siphonotreta], Davidson [1853, PI. IX, figs. 267 and 268] Siphonotreta verrucosa. 



Eichwald [1860, pp. 916-917] Do. 



Gagel [1890, p. 22] Do. * 



Kutorga [1848, pp. 266-267] Do. 



Morris [1849, PI. VII, figs. 2a-d] Do. 



Quenstedt [1871, p. 674] Do. 



Quenstedt [1885, p. 755] Do' 



Schmidt [1861, p. 218] Do. 



de Verneuil [1845, p. 287] Do. 



verrucosa [Terebratula], Eichwald [1840, pp. 140-141 (26-27)] Do. 



villaboimensis [Acrothele], Delgado [1904, p. 365] Acrothele villaboimensis. 



volborthi [Obolus], Mickwitz [1896, pp. 155-157] Obolus volborthi, 



Volborthia Hall and Clarke [1892a, p. 249] Volborthia. 



Hall and Clarke [1892b, p. 565] Do. 



Hall and Clarke [1892c, pp. 95-96] Do. 



von Moller [1874, pp. 449-452] Do. 



Walcott [1908e, PI. XI, and pp. 142 and 143] Do. 



Volborthia recurva Hall and Clarke [1892a, figs. 261 and 262, p. 249] Volborthia recurva. 



Hall and Clarke [1892b, figs. 261 and 262; p. 565] Do. 



Hall and Clarke [1892c, pp. 95-96] Do. 



von Moller [1874, pp. 449^52] Do. 



W. 



walcotti [Strophomena (Eostrophomena)], Moberg and Segerberg [1906, 



p. 71] Eostrophomena elegantula. 



wanneri [Yorkia], Walcott [1897b, p. 715] Yorkia wanneri. 



wanniecki [Lingulella], Eedlich [1899, p. 7] Lingulella wanniecki. 



wanniecki [Obolus (Lingulella)], Walcott [1905a, p. 332] Do. 



wapta [Micromitra (Paterina)], Walcott [1908d, p. 59] Micromitra (Paterina) wapta. 



warthi [Lingula?], Waagen [1885a, pp. 769-770] Lingulella kiurensis. 



Waagen[1891, PI. II, figs. 18a-b] Do. 



warthi [Neobo^us], Freeh [1897, PL lA, figs. 5a-b] Neobolus warthi. 



Hall and Clarke [1892a, p. 24.5] Do. 



Hall and Clarke [1892b, p. 561] Do. 



Hall and Clarke [1892c, p. 84] • Do. 



Oehlert [1887, p. 1263] Do 



Waagen [1885a, pp. 758-7.59] Do. 



Waagen [1891, PL II, figs. 5-9] Do. 



warthi [Orthis], Waagen [1891, pp. 102-104] Wynnia warthi. 



