92 CAMBRIAN BRACHIOPODA. 



Present reference. 



socialis [Acrotreta cf .], Matthew [1902b, pp. 392-394] Acrotreta sp. undt., not A. socialis. 



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



solidus [Obolus (Leptembolon) lingulseformis], Mickwitz [1896, pp. 204- 



205] , Lingulella (Leptembolon) lingulaeformis. 



spatulus [Obolus (Lingulella)], Walcott [1902, p. 607] Lingulella (Liagulepis) spatula. 



spencei [Protorthis], Walcott [1905a, p. 285] Nisusia (Jamesella) spencei. 



Sphserobolus Matthew [1895b, p. 263] Obolus (Lingulobolus). 



Sphserobolus spissus Grabau [1900, pp. 622-623] Obolus (Lingulobolus) spissus. 



Matthew [1895b, pp. 263-266] Do. 



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



Spirifera? lenticularis von Buch [1834, p. 48] Orusia lenticularis. 



epissa [Lingulella?], Billings [1872b, pp. 468-469] ; . . .Obolus (Lingulobolus) spissus. 



Billings [1874, pp. 67-68] Do. 



Billings [1882, p. 15] Do. 



spissus [Obolus (Liugulobolus)], Walcott [1898a, p. 327] Do. 



spissus [Sphserobolus], Grabau [1900, pp. 622-623] Do. 



Matthew [1895b, pp. 263-266] Do. 



spurri [Acrothele], Walcott [1908d, pp. 86-87] Acrothele spurri. 



squama [Davidsonella], Waagen [1885, pp. 766-767] Neobolus warthi. 



squamosa [?Lingula], Davidson [1866, p. 41] Lingulella (Lingulepis?) squamosa. 



squamosa [Lingula], HoU [1865, p. 102] Do. 



starri [Lingulella], Matthew [1891, pp. 146-147] Lingulella (Lingulepis) starri. 



starri [Lingulepis], Matthew [1903, p. 195] Do. 



starri exigua [Lingulepis], Matthew [1903, pp. 197-198] Lingulella (Lingulepis) exigua. 



starri minor [Lingulella], Matthew [1892, pp. 58-59] Lingulella minor. 



starri var. [Lingulepis], Matthew [1903, pp. 193-197] Lingulella (Lingulepis) exigua. 



stissingensis [Iphidea], Schuchert [1897, p. 234] Micromitra (Paterina) stissingensis. 



■ stissingensis [Iphidella], Walcott [1905a, p. 308] Do. 



stissingensis [Kutorgina], D wight [1889, pp. 145-147] Do. 



Dwight [1891, p. 105] Do. 



stissingensis ora [Micromitra (Paterina)], Walcott [new] Micromitra (Paterina) stissingeosis era. 



stoneana [Lingulella], Hall and Clarke [1892c, PI. II, figs. 9-11] Obolus (Westonia) stoneanus. 



Weller [1903, p. 112] Do. 



■RTiitfield [1882, pp. 344-345] Do. 



stoneanus [Obolus (Westonia)], Walcott [1901, p. 691] Do. 



striata [Billingsella], Walcott [1905a, p. 245] Billingsella striata. 



Strophomena ata va Matthew [1893b , pp . 102-103] Eoorthis atava . 



Strophomena? atava Moberg and Segerberg [1906, PI. II, figs. 7, 7a-b] Do. 



Strophomena (Eostrophomena) Walcott [1905a, p. 256] Eostrophomena. ' 



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

 Strophomena (Eostrophomena) walcotti Moberg and Segerberg [1906, p. 71]. Do. 



strophomenoides [Orthis lenticularis], Matthew [1892, p. 49] Orusia lenticularis. 



Matthew [1903, p. 217] Do. 



stuarti [Micromitra (Paterina)], Walcott [1908d, p. 58] Micromitra (Paterina) stuarti. 



subconica [Acrotreta], 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. 



subquadrata [Nisusia (Jamesella) perpasta], Walcott [1905a, p. 255] Nisusia (Jamesella) perpasta eubquadrata. 



subquadrata [Orthis perpasta], Pompeckj [1896b, p. 516] Do. 



subsidua [Acrothele], Beecher [1891, PI. XVII, fig. 12] Acrothele subsidua. 



Grabau and Sh'imer [1907, p. 200] Do. 



Hall and Clarke [1892c, pp. 100 and 103] Do. 



Matthew [1902c, p. 110] Do. 



Matthew [1903, p. 103] Acrothele spurri. 



Walcott [1886b, pp. 108-109, PI. IX, figs. 4a-c] Acrothele subsidua. The paragraph on 



page 109 includes i-eference to this spe- 

 cies and to Acrothele spurri. 



Walcott [1886b, p. 109, PL IX, fig. 4] Acrothele spurri. The paragraph on page 



109 includes reference to this species and 

 to Acrothele subsidua. 



