LOCALITIES. 165 



(For stratigrapMc position and association, see p. 156.) Middle Cambrian: Thin-bedded limestone less than 

 400 feet (121.9 m.) above the quartzitic sandstones of the Cambrian, at Ophir, Oquirrh Range, Tooele 

 County, Utah (H. E. Dickhaut, 1900). 



*AcrotheIe subsidua laevis. 

 *Acrotreta ophirensis. 

 *Acrotreta ophirensis rugosa. 

 Olenoides?. 



Micromitra sp. 



*Micromitra (Iphidella) pannula ophirensis". 



Obolus matinalis. 



Obolus tetonensis. 



Lingulella arguta. 



3g (see 360h). Middle Cambrian: Shales on river bank 250 feet (76.2 m.) above west end of Denver and Rio 

 Grande Railway tunnel, Glenwood Springs, Garfield County, Colo. 

 Obolus (Westonia) ella. 

 Lingulella sp. 



31i. (For stratigraphic position and association, see p. 131.) Upper Cambrian: Shale and shaly limestone, on 

 McNeil Brook, 1.5 miles (2.4 km.) east of Marion Bridge, Cape Breton, Nova Scotia (S. W. Loper, 1900). 

 *Obolus acadicus. 

 Obolus (Broggeria) salteri. 

 Lingulella concinna. 



Lingulella ferruginea. 

 Schizambon priscus. 



3i. (For stratigraphic position and association, see p. 132.) . Middle Cambrian: Compact, fine-grained, thm-bedded 

 gray sandstone of the Paradoxides zone, on McLean Brook, 1 mile (1.6 km.) east of McCodrum Brook and 

 1.5 miles (2.4 km.) west of Marion Bridge, Cape Breton, Nova Scotia (S. W. Loper, 1900). Matthew [1903, 

 p. 195] says the horizon is his Division C2b. 



*Lingulella cania. Lingulella rotunda. 



Lingulella concinna. *Lingulella (Lingulepis) exigua. 



Lingulella ferruginea. Acrothyra proavia. 



3j (same locality as 5], but 25 feet above; see 4v and 4q). Middle Cambrian: Above the quartzitic sandstones, in 

 a shale corresponding in position to the upper part of shale No. 6 of the Dearborn River section [W^alcott, 

 1908f, p. 202], about 6 miles (9.6 km.) west-northwest of Scapegoat Mountain, on the Continental Divide 

 between Bar Creek and the headwaters of the south fork of the North Fork of Sun River, Coopers Lake 

 quadrangle (U. S. G. S.) Powell County, Mont. (C. D. Walcott, 1905). 



Obolus mcconnelli. 



Bathyuriscus productus (Hall and Whitfield). 



3n. (For stratigraphic position and association, see p. 131.) Upper Cambrian: Thin-bedded sandstone on Salmon 

 River, Gillis Hill, 13 miles (20.9 km.) south of Marion Bridge, eastern Cape Breton, Nova Scotia (S. W. 

 Loper, 1900). 



Lingulella minor. I *Acrotreta convexa. 



Lingulella (Lingulepis) exigua. | 



3o (see 372c). (For stratigraphic position and association, see p. 131.) Upper Cambrian: Shales in the first 

 ravine south of the post office at Barachois, east of Little Bras d'Or Lake, eastern Cape Breton, Nova Scotia 

 (S. W. Loper, 1900). 

 Lingulella concinna. 



3p. (For stratigraphic position and ass9ciation, see p. 131.) Upper Cambrian: Shales in ravine 0.5 mile (0.8 km.) 

 north of McMullins, on the crossroad to Boisdale station, eastern Cape Breton, Nova Scotia (S. W. Loper, 

 1900). 

 Lingulella concinna. 



3c(. (For stratigraphic position and association, see p. 131.) Upper Cambrian: Shale in Barachois Glen, 4 miles 

 (6.4 km.) south of Little Bras d'Or Lake, eastern Cape Breton, Nova Scotia (S. W. Loper, 1900). 

 Obolus (Broggeria) salteri. j Schizambon priscus. 



Lingulella concinna. I Acrotreta bisecta. 



3s (same horizon as Iz, 4, and 15b; =3t and 8g). (For stratigraphic position and association, see p. 156.) Middle 

 Cambrian: About 1,700 feet (518.2 m.) above the Lower Cambrian and 2,700 feet (823 m.) below the Upper 

 Cambrian, in the shaly limestones and calcareous shales of the Wheeler formation [Walcott, 1908f, p. 181], in 

 the eastern part of Wheeler Amphitheater, east of Antelope Springs, House Range [Walcott, 1908f, Pis. XIII [ 

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



Obolus mcconnelli pelias. 

 Acrothele subsidua. 

 Acrotreta attenuata. 

 Agnostus bidens (Meek). 



Ptychoparia kingi (Meek). 

 Ptychoparia sp. 

 Asaphiscus wheeleri (Meek). 



