190 



CAMBRIAN BRACHIOPODA. 



; (=llq and lly; same horizon as 3w). (For stratigraphic position and association, see p. 156.) Middle Cam- 

 brian: About 2,350 feet (716.3 m.) above the Lower Cambrian and 2,050 feet (624.8 m.) below the Upper 

 Cambrian, in the limestone forming Ic of the Marjum limestone [W'alcott, 190Sf, p. 180], 2.5 miles (4 km.) 

 east of Antelope Springs, in ridge east of Wheeler Amphitheater fWalcott, 1908f, Pis. XIII andXV], House 

 Range, Millard County, Utah (C. D. Walcott, F. B. Weeks, and L. D. Burling, 19051. 



Obolus mcconnelli pelias. 

 Acrothele subsidua. 

 Acrotreta ophirensis. 

 Acrotreta cf . ophirensis. 

 Hyolithes. 

 Crinoidal fragments. 

 Sponge. 

 Ogygopsis?. 



Agnostus 2 sp. 



Ptjrchoparia 3 sp. 



Solenopleura. 



Neolenus inflatus Walcott. 



Neolenus intermedius Walcott. 



Neolenus intermedius pugio Walcott. 



Neolenus superbus Walcott. 



Boh. (For stratigraphic position and association, seep. 154.) Upper Cambrian: About 350 feet (106.7 m.) above 

 the Middle Cambrian and 2,950 feet (899.2 m.) below the top of the Upper Cambrian, near the base of the 

 arenaceous limestones forming 2a of the Orr formation [Walcott, 1908f, p. 177], on Orr Ridge, about 5 miles 

 (8 km.) south of Marjum Pass, House Range [Walcott, 1908f, PI. XIII], MUlard County, Utah (F. B. 

 Weeks, 1905). 



Lingulella desiderata. 

 Acrotreta idahoensis. 

 Acrotreta idahoensis sulcata. 



Crepicephalus texanus (Shumard). 



Bathyuriscus. 



lUsenurus?. 



30j. (For stratigraphic position and association, seep. 154.) Upper Cambrian: About 950 feet (289.6 m.) above 

 the Middle Cambrian and 2,450 feet (746.8 m.) below the top of the Upper Cambrian, near the base of the 

 arenaceous shales and limestones forming le of the Orr formation [Walcott, 1908f, p. 176], on Orr Ridge, 

 about 5 miles (8 km.) south of Marjum Pass, House Range [Walcott, 19081, PI. XIII], Millard County, 

 Utah (C. D. Walcott, F. B. Weeks, and L. D. Burling, 1905). 



*Linnarssonella transversa. 



Agnostus. 



Crepicephalus. 



Micromitra (Paterina) crenistria. 

 Obolus mcconnelli pelias. 

 Lingulella desiderata. 

 Lingulella isse. 



30k (25 feet below 31t at same locality). (For stratigraphic position and association, see p. 154.) Upper Cambrian: 

 1,150 feet (350.5 m.) above the Middle Cambrian and 2,175 feet (662.9 m.) below the top of the Upper Cam- 

 brian, at the top of the arenaceous shales and limestones forming le of the Orr formation [Walcott, 1908f, 

 p. 176], on Orr Ridge, about 5 miles (8 km.) south of Marjum Pass, House Range [Walcott, 1908f, PI. XIII], 

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



Lingulella desiderata. Ptychoparia?. 



Lingulella isse. Solenopleura. 



*Linnarssonella modesta. 



301 (30y is the metamorphosed equivalent of this at different locality). (For stratigraphic position and association, 

 seep. 153.) Upper Cambrian: About 1,400 feet (426.7 m.) above the Middle Cambrian and 1,900 feet (579.1 

 m.) below the top of the Upper Cambrian, in the shales forming lb of the Orr formation [Walcott, 1908f, 

 p. 176], on Orr Ridge, about 5 miles (8 km.) south of Marjum Pass [Walcott, 1908f, PI. XIII], House 

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



Lingulella manticula. [ Ptychaspis. 



Section of crinoid column. [ Anomocare. 



SOm. (For stratigraphic position and association, see p. 153.) Upper Cambrian : About 1,950 feet (584.4 m.labovethe 

 Middle Cambrian and 1,350 feet (411.5 m.) below the top of the Upper Cambrian, in the siliceous limestones 

 forming le of the Notch Peak limestone [Walcott, 19081, p. 175], on the slopes of Notch Peak, about 5 miles 

 (8 km.) southwest of Marjum Pass, House Range [Walcott, 1908f, PI. XIII], Millard County, Utah (C. D. 

 Walcott, F. B. Weeks, and X. D. Burling, 1905). 

 *Obolus tetonensis leda. 



son (=30n'). (For stratigraphic position and association, seep. 155.) Middle Cambrian: About 3,750 feet (1,143 m.) 

 above the Lower Cambrian and 650 feet (198 m.) below the Upper Cambrian, in the shaly limestones form- 

 ing Ic of the Weeks limestone [Walcott, 19081, p. 175], on the north side of Weeks Canyon, about 4 miles 

 (6.4 km.) south of Marjum Pass, House Range [Vi'alcott, 1908f, PI. XIII], Millard County, Utah (C. D. Wal- 

 cott and L. D. Burling, 1905). 



*Obolus (Fordinia) perfectus. 



Lingulella isse. 



Acrotreta ophirensis. 



*Acrotreta ophirensis descendens. 



Hyolithes. 



Agnostus, several species. 



Ptychoparia, several speties. , 



Asaphiscus sp. 



Crepicephalus texanus (Shumard). 



Neolenus. 



Solenopleura. 



