LOCALITIES. 179 



(For stratigraphic position and association, see p. 155.) Middle Cambrian: About 2,750 feet (838.2 m.) 

 above the Lower Cambrian and 1,650 feet (502.9 m.) below the Upper Cambrian, in limestone at the base, 

 la, of the Marjum limestone [Walcott, 1908f, p. 179], about 4 miles (6.4 km.) southeast of Antelope 

 Springs, in the spur at the junction of the Deseret and Swasey Spring roads [Walcott, 1908f, PI. XIII], 

 House Range, Millard County, Utah (C. D. Walcott, F. B. Weeks, and L. D. Burling, 1903 and 1905). 



Micromitra (Iphidella) pannula ophirensis. 

 Obolus mcconnelli pelias. 

 Obolus rotuudatus. 

 Acrotreta idahoensis. 

 Annelid trails. 



Stenotheca sp. 

 Hyolithes. 

 Bathyuriscus?. 

 Ptychoparia 2 sp. 

 Anomocare. 



lip. (For stratigraphic position and association, see p. 156.) Middle Cambrian: About 2,000 feet (609.6 m.) above 

 the Lower Cambrian and 2,400 feet (731.5 m.) below the Upper Cambrian, in the limestones forming le 

 of the Marjum limestone [Walcott, 1908f, p. 181], in the long cliff about 2.5 miles (4 km.) southeast of Mar- 

 jum Pass [Walcott, 1908f, Pis. XIII and XV], House Range, Millard County, Utah (C. D. Walcott, F. B. 

 Weeks, and L. D. Burling, 1905). 



Linnarssonella sp. 



Sponge spiculae. 



Agnostus, several sp. 



llq (=lly and 30g; same horizon as 3w). (For stratigraphic position and association, see p. 156.) (C. D. Walcott, 

 F. B. Weeks, and L. D. Burling, 1903 and 1905.) 



Ptychoparia 2 sp. 



Neolenus inflatus Walcott. 

 Neolenus intermedins Walcott. 

 Neolenus intermedius pugio Walcott. 

 Neolenus superbus Walcott. 

 Ogygopsis?. 



*Obolus mcconnelli pelias. 

 Lingulella arguta. 

 Acrothele subsidua. 

 Nisusia (Jamesella) nautes?. 

 Nisusia (Jamesella) spencei. 

 Eoorthis thyone. 



lis. (For stratigraphic position and association, see p. 157.) Middle Cambrian: Shales justabove Simpson Spring, 

 about 20 miles (32.2 km.) west-southwest of Vernon, on the stage road from Vernon to Fish Spring, Tooele 

 County, Utah (C. D. Walcott, 1903). 



Obolus (Westonia) ella?. 



Micromitra sculptilis. 



llu. (For stratigraphic position and association, see p. 156.) Middle Cambrian: Lower portion of the shales 

 forming the Wheeler formation, in Rainbow Valley, House Range [see Walcott, 1908f, PI. XIII], Millard 

 County, Utah (C. D. Walcott, 1903). 

 Acrothele subsidua. 



llw (=30c). (For stratigraphic position and association, see p. 157.) Middle Cambrian: About 1,050 feet (320 m.) 

 above the Lower Cambrian and 3,350 feet (1,021.1 m.) below the Upper Cambrian, in the shales forming 

 Id of the Swasey format'on [Walcott, 1908f, p. 182], at the head of Dome Canyon, House Range [Walcott, 

 1908f, PI. XIII], Millard County, Utah (C. D. Walcott and F. B. Weeks, 1903). 



Lingulella arguta. 



Ptychoparia. 



llx (=3x). (For stratigraphic position and association, see p. 156.) (C. D. Walcott, 1903.) 

 Obolus rotundatus. 

 Lingulella arguta. 



lly (=llq and 30g). (For stratigraphic position and association, see p. 156.) (C. D. Walcott, 1903.) 

 Lingulella arguta. 

 Acrothele subsidua. 

 Acrotreta cf . ophirensis. 



llz. (For stratigraphic position and association, see p. 132.) Middle Cambrian: Sandstone on Big Ridge 2 

 miles (3.2 km.) south of Marion Bridge, on the canal of John McDougald, eastern Cape Breton, Nova Scotia 

 (S. W. Loper). 



Obolus (Westonia) escasoni. 



Lingulella (Lingulepis) exigua. 



12. (For stratigraphic position and association, see p. 147.) Middle Cambrian: Sandy shale on Webbs Ridge, in 

 gap west of Sim.p8on's farm, 6 miles (9.6 km.) northeast of Knoxville, Knox County, Tenn. (C. D. Walcott, 

 1891). 

 Linnarssonella tennesseensis. 



