208 CAMBRIAN BRACHIOPODA. 



67g. (For stratigraphic position and association, see p. 128.) Middle Cambrian: About 1,700 feet (518 m.) above 

 the Lower Cambrian and 3,250 feet (991 m.) below the Upper Cambrian, in the siliceous shales forming 

 2d of the Stephen formation [Walcott, 1908f, p. 211], on Mount Bosworth, north of the Canadian Pacific 

 Railway between Hector and Stephen, on the Continental Divide between British Columbia and Alberta, 

 Canada (C. D. Walcott and L. D. Burling, 1907). 



Micromitra (Iphidella) pannula. 

 Obolus (Westonia) ella. 

 Cruziana. 

 Hyolithes. 



Leperditia. 



Ptychoparia. 



Bathyuriscus. 



57j. (For stratigraphic position and association, see p. 127.) Middle Cambrian: About 2,000 feet (609.6 m.) above 

 the Lower Cambrian, in the limestone forming 2 of the Stephen formation [Walcott, 1908c, p. 237 (6)], just 

 east of the "fossil bed" on the northwest slope of Mount Stephen, above Field on the Canadian Pacific 

 Railway, British Columbia, Canada (C. D. Walcott and L. D. Burling, 1907). 



Micromitra (Iphidella) pannula. 

 Nisusia alberta var. 

 Hyolithes. 



Bathyuriscus rotundatus (Rominger). 

 Neolenus serratus (Rominger). 



57k (=57c). (For stratigraphic position and association, see p. 127.) (C. D. Walcott and L. D. Burling, 1907.) 



Obolus mcconnelli. 

 Nisusia alberta var. 

 Agnostus. 



Agraulos. 



Ptychoparia. 



Neolenus. 



.S7iii. (For stratigraphic position and association, see p. 129.) Lower Cambrian: About 50 feet (15 m.) below the 

 Middle Cambrian, in a siliceous shale correlated with lb of the Mount Whyte formation on Mount Bosworth 

 [Walcott, 1908f, p. 213], just above the tunnel on the north shoulder of Mount Stephen, about 3 miles (4.8 

 km.) east of Field, British Columbia, Canada (C. D. Walcott and L. D. Burling, 1907). 



Micromitra (Paterina) sp. 

 Acrotreta sagittalis taconica. 

 Nisusia (Jamesella) lowi. 

 Cystid plates. 



Scenella varians Walcott. 



Hyolithes. 



Hyolithellus cf. micans (Billings). 



Olenellus canadensis Walcott. 



57n. (For stratigraphic position and association, see p. 127.) Middle Cambrian: About 3,000 feet (914.4 m.) 

 above the Lower Cambrian and about 700 feet (213.4 m.) above the base of a limestone correlated with 

 4 of the Eldon limestone on Mount Bosworth [Walcott, 1908f, p. 209], .on the northwest slope of Mount 

 Stephen, above Field on the Canadian Pacific Railway, British Columbia (C. D. Walcott and L. D. 

 Burling, 1907). 



Lingulella cf. isse. 



Protospongia (spicules). 



Hyolithes. 



Agnostus cf. montia Matthew. 



Zacantlioides spinosus (Walcott). 



Ptychoparia. 



Bathyuriscus. 



Ogygopsis. 



57r (=58s). (For stratigraphic position and association, see p. 129.) (L. D. Burling, 1907.) 

 Micromitra (Paterina) labradorica var. I Acrotreta sagittalis taconica. 



Micromitra (Iphidella) pannula. I Ptychoparia 3 sp. 



S7s. (For stratigraphic position and association, see p. 129.) Lower Cambrian: About 160 feet (49 m.) below the 

 Middle Cambrian, near the base of the gray oolitic limestone forming lb of the Mount Whyte formation 

 [Walcott, 1908f, p. 212], on Mount Bosworth, north of the Canadian Pacific Railway between Hector and 

 Stephen, on the Continental Divide between British Columbia and Alberta, Canada (C. D. Walcott, 1907). 



Nisusia (Jamesella) lowi. 

 Acrotreta sagittalis taconica. 

 Microdiscus?. 



Agraulos sp. 

 Ptychoparia sp. 



87y. (For stratigraphic position and association, see p. 128.) Middle Cambrian: About 1,900 feet (579 m.) above 

 the Lower Cambrian and 3,050 feet (930 m.) below the Upper Cambrian, in the siliceous shales forming 

 2a of the Stephen formation [Walcott, 1908f, p. 211], on Mount Bosworth, north of the Canadian Pacific 

 Railway between Hector and Stephen, on the Continental Divide between British Columbia and 

 Alberta, Canada (C. D. Walcott and L. D. Burling, 1907). 

 Obolus (Westonia) ella?. 



