204 



CAMBKIAN BKACHIOPODA. 



64q (same horizon as 32x). (For stratigraphic position and association, see p. 150.) Middle Cambrian: A drift 

 block supposed to have come from a horizon 1,700 feet (518.2 m.) above the Brigham quartzite [Walcott, 

 1908a, p. 8], found near the mouth of Wasatch Canyon, east of Lakeview ranch, 5 miles (8 km.) north of 

 Brigham, Boxelder County, Utah (C. B. Walcott, 1906). 



Micromitra (Iphidella) pannula?. 



Obolus sp. undt. 



*Obolus (Westonia) wasatchensis. 



54r. 



Acrothele subsidua. 

 Nisusia alberta. 

 Nisusia alberta?. 



(For stratigraphic position and association, see p. 148.) Upper Cambrian: Drift pieces of limestone from the 

 west slope of the Wasatch Range, east of Lakeview ranch, about 5 miles (8 km.) north of Brigham, Box- 

 elder County, Utah (C. D. Walcott and L. D. Burling, 1906). 



Obolus mcconnelli pelias. 



Eoorthis desmopleura. 



54s (=5b). (For sti'atigraphic position and association, see p. 152.) Middle Cambrian: Dark blue-gray Langston 

 limestone [Walcott, 1908f, p. 198], just above the Cambrian quartzitic sandstones, north side of Twomile 

 Canyon, near its mouth, 2 miles (3.2 km.) southeast of Malade, Oneida County, Idaho (C. D. Walcott and 

 L. D. Burling, 1906). 



Billingsella coloradoensis. 



Hyolithes. 



Orthotheca. 



Stenotheca. 



Platyceras. 



Agnostus, 



Microdiscus. 



Solenopleura. 



Ptychoparia 2 sp. 



Oryctocephalus. 



Dorypyge 2 sp. : 



Neolenus 2 sp. 



Asaphiscus. 



Ogygopsis?. 



*Micromitra haydeni (54s). 



Micromitra (Iphidella) pannula. 



*Micromitra (Iphidella) pannula maladensis (5b) 



Micromitra (Iphidella) pannula ophirensis. 



Lingulella desiderata. 



Lingulella helena. 



Lingulella isse. 



*Acrothele artemis (5b). 



Acrothele subsidua. 



Acrothele subsidua var. 



Acrotreta idahoensis sulcata. 



Acrotreta pyxidicula. 



Acrotreta?. 



*Acrothyra minor (5b). 



84t (=4y, 5a, 5c, 5e, and 54w). (For stratigraphic position and association, see p. 149.) Upper Cambrian: Lime- 

 stone of the St. Charles limestone [Walcott, 1908a, p. 6], about 250 feet (76 m.) above the Middle Cambrian, 

 on the north side of Twomile Canyon, near its mouth, 2 miles (3.2 km.) southeast of Malade, Oneida County, 

 Idaho (C. D. Walcott and L. D. Burling, 1906). 



Obolus wortheni. Acrotreta idahoensis sulcata. 



Obolus (Westonia) ella. Billingsella coloradoensis. 



Lingulella desiderata. Ptychoparia. 



Acrotreta idahoensis. Anomocare. 



54u. (For stratigraphic position and. association, see p. 149.) ITpper Cambrian: Limestone of the St. Charles lime- 

 stone [Walcott, 1908a, p. 6], about 100 feet (30.5 m.) above the Middle Cambrian, on the north side of Two- 

 mile Canyon, near its mouth, 2 miles (3.2 km.) southeast of Malade, Oneida County, Idaho (C. D. Walcott 

 andL. D. Burling, 1906). 



*Obolus wortheni. 

 Acrotreta idahoensis.. 

 Billingsella coloradoensit. 

 Agnostus. 



Ptychoparia 2 sp. 



Ptychaspis. 



Anomocare. 



54v. (For stratigraphic position and association, see p. 150.) Middle Cambrian: Limestone in the lower part of 

 the Bloomington formation [Walcott, 1908a, p. 7], about 1,600 feet (488- m.) below the Upper Cambrian, on 

 the south side of Twomile Canyon, near its mouth, 2 miles (3.2 km.) southeast of Malade, Oneida County, 

 . Idaho (C. D. Walcott and L. D. Burling, 1906). 

 Obolus wortheni. 

 Ptychoparia 2 sp. 



54w (=54t). (For stratigraphic position and association,, see p. 149.) (C. D. Walcott and L. D. Burling, 1906.) 

 Obolus tetonensis ninus. | Ptychoparia 2 sp. 



Obolus wortheni. I Liostracus. 



Agnostus 2 sp. Anomocare 3 sp. 



Ptychaspis. I Damesella sp. 



