256 CAMBEIAN BRACHIOPODA. 



321r.<' (For stratigraphic position and association, see p. 145.) Middle Cambrian: Limestones of the Paradoxides 

 forchhammei-i zone at Hunneberg, western boundary of the Province of Skaraborg, Sweden. 

 Billingsella exporrecta. 



321s [U. S. National Museum]. . (For stratigraphic position and association, see p. 146.) Lower Cambrian: Brown 

 sandstone interbedded in gray sandstone at Sularp, near Lund, Province of Malmohus, Sweden. 

 Obolella lindstromi. 

 *Obolella mobergi. 



321t [U. S. National Museum]. (For stratigraphic position and association, see p. 145.) Middle Cambrian: Sand- 

 stone at Sularp, near Lund, Province of Malmohus, Sweden. 

 Billingsella lindstromi. 



321u [U. S. National Museum]. (For stratigraphic position and association, see p. 145.) Middle Cambrian: Sand- 

 stone at Bjorkelunda, south of Simrishamn, Province of Christianstad, Sweden. 

 Billingsella lindstromi. 



321v [D. S. National Museum]. (For stratigraphic position and association, see p. 146.) Lower Cambrian: Gray 

 sandstone of the Mesonacis torelli zone at Bjorkelunda, south of Simrishamn, Province of Christianstad, 

 Sweden. 



*Obolella lindstromi'. 



Obolella mobergi. 



Mesonacis torelli Moberg. 



321x [U. S. National Museum]. (For stratigraphic position and association, see p. 145.) LTpper Cambrian: Dictyo- 

 graptus slate at Alunbruk (alum works), southern part of Oeland Island, Sweden (Schmalensee, 1899). 

 Obolus (Broggeria) salteri. 



321y [U. S. National Museum]. (See 8w, 3101, and 320f.) (For stratigraphic position and association, see p. 145.) 

 Middle Cambrian: Shale at Andrarum, 20 miles (32 km.) northwest of Simrishamn, Province of Christianstad, 

 Sweden. 

 Acrotreta sagittalis. 



321z [U. S. National Museum]. (For stratigraphic position and association, see p. 145.) Middle Cambrian: Shales 

 at Fogels&ng, 5 miles (8 km.) east of Lund, Province of Malmohus, Sweden. 

 Acrotreta sagittalis. 



322 [U. S. National Museum]. (For stratigraphic position and association, see p. 152.) Middle Cambrian: Lime- 



stone (stratigraphic position unknown) about 6 miles (9.6 km.) west-southwest of Liberty and 15 miles (24.2/ 

 km.) west of Montpelier, Bear Lake County, Idaho. 

 Acrotreta pyxidicula. 



322a [U. S. National Museum]. (For stratigraphic position and association, see p. 152.) Middle Cambrian: Lang- 

 ston limestone near Paris, Bear Lake County, Idaho (R. S. Spence). 

 *Acrotreta idahoensis sulcata. 

 Microdiscus. 

 Ptychoparia, 2 sp. 



323 [Wiman, 1902, p. 66]. (For stratigraphic position and association, see p. 144.) Passage beds between the 



Upper Cambrian and the Ordovician: Phyllograptus elate and Ceratopyge limestone in the Christiania region, 



Norway. 

 Acrotreta sagittalis. 



323a [Wiman, 1902, p. 66]. (For stratigi'aphic position and association, seep. 145.) Upper Cambrian: Ceratopyge 



slate in the Christiania region, Norway. 

 Acrotreta sagittalis. 

 Lingulella lepis. 



323b [U. S. National Museum]. (For stratigraphic position and association, see p. 146.) Middle Cambrian: Lime- 

 stone of Paradoxides celandicus zone at Windjuelandet, Ringsaker, Province of Hedemarken, Norway. 

 Acrotreta schmalenseei . 



3230 [Brogger, 1882, p. 44]. (For stratigraphic position and association, see p. 144.) Passage beds between the 

 Upper Cambrian and the Ordovician: Ceratopyge limestone in the Christiania region, Norway. 

 Lingulella lepis. 



323d [Christiania University Mineral Institute collections]. (For stratigraphic position and association see p. 144.) 

 Passage beds between the Upper Cambrian and the Ordovician: Ceratopyge limestone (Etage 3a?- of Brog- 

 ger) at Christiania, Norway. 

 Acrotreta seebachi. 



a The authority for the citation of this locality was mislaid and could not be traced in time for insertion in this volume. 



