LOCALITIES. 175 



9v (150 feet below 9w; between 9r and 9t). (For stratigraphic position and association, see p. 142.) Upper Cam- 

 brian: Limestone of the Reagan sandstone about 250 feet (76 m.) below the Arbuckle limestone, SW. { 

 sec. 17, T. 4 N., R. 12 W., about 11 miles (17.7 km.) northwest of Fort Sill, Comanche County, Okla. (E. 0. 

 Ulrich, 1901). 



Llngulella (Lingulepis) acuminata. 

 Linnarssonella girtyi. 

 Agnostus sp. 



Agraulos sp. 

 Chariocephalus? sp. 

 Illsenurus? sp. 



9w (150 feet above 9v). (For stratigraphic position and association, see p. 142.) Upper Cambrian: Limestone of 

 the Reagan sandstone about 100 feet (30.5 m.) below the Arbuckle limestone, SW. J sec. 17, T. 4 N., R. 12 

 W., 11 miles (17.7 km.) northwest of Fort Sill, Comanche County, Okla. (E. 0. Ulrich, 1901). 



Eoorthis indianola. 



Agnostus. 



9x (almost same horizon as 9p). (For stratigraphic position and association, see p. 142.) Upper Cambrian: Sand- 

 stones lying between beds of quartzite underlying the 300 feet of limestone at the top of the Reagan sand- 

 stone, SW. I sec. 17, T. 4 N., R. 12 W., about 11 miles (17.7 km.) northwest of Fort Sill, Comanche County, 

 Okla. (E. 0. Ulrich, 1901). 

 Dicellomus politus. 



9z. (For stratigraphic position and association, see p. 142.) Upper Cambrian: Basal beds of the Arbuckle lime- 

 stone, about 25 feet above the heavy bedded limestone, near the middle of the west half of sec. 13, T. 4 N., 

 R. 13 W., about 13 miles (20.8 km.) northwest of Fort Sill, Comanche County, Okla. (E. 0. Uhich, 1901). 



Eoorthis wichitaensis. 



Dikellocephalus. 



10a (see 106). (For stratigraphic position and association, see p. 147.) Middle Cambrian: Sandy layers of the 

 Rome formation in western raUroad cut through Shocks Gap, in Bays Mountains, 10 miles (16.1 km.) south- 

 east of Knoxville [see Keith, 1895, areal geology sheet], Knox Comity, Tenn. (C. D. Walcott, 1891). 



*Obolus pandemia. 



*Lingulella auga. 



Lingulella similis. 



10b. (For stratigraphic position and association, see p. 147.) Middle Cambrian: Sandy layers of the Rome forma- 

 tion at the western end of the central railroad cut through Shocks Gap, in Bays Mountains, 10 miles (16.1 km.) 

 southeast of Knoxville [see Keith, 1895, areal geology sheet], Knox County, Tenn. (C. D. Walcott, 1891). 

 Lingulella auga. 



10c (50 feet below 10k). (For stratigraphic position and association, see p. 131.) Upper Cambrian: Shales on west 

 side of Barachois River, eastern Cape Breton, Nova Scotia (S. W. Loper, 1901). 

 Obolus (Broggeria) salteri. I Schizambon prisons?. 



Lingulella concinna. ] Acrotreta bisecta. 



lOd. (For stratigraphic position and association, seep. 131.) Upper Cambrian: Shales on west side of Barachois 

 River, 0.125 mile (0.2 km.) north of Boisdale road, opposite McMullin's place, eastern Cape Breton, Nova 

 Scotia (S. W. Loper, 1901). 



Obolus (Broggeria) salteri. I Schizambon priscus. 



Lingulella concinna. | Acrotreta bisecta. 



lOe (50 feet above lOf). (For stratigraphic position and association, see p. 131.) Upper Cambrian: Shales on the 

 east branch of Barachois River, 0.5 mile (0.8 km.) north of the crossroad from Boisdale to Upper Leitches 

 Creek, eastern Cape Breton, Nova Scotia (S. W. Loper, 1901). 



Obolus (Broggeria) salteri. 

 Lingulella concinna. 

 Schizambon priscus. 



Acrotreta bisecta. 

 Acrotreta convexa. 



lOf (=10g; 50 feet below lOe). (For stratigraphic position and association, see p. 131.) Upper Cambrian: Shales 

 on the east branch of Barachois River, 0.75 mile (1.2 km.) north of the crossroad from Boisdale to Upper 

 Leitches Creek, eastern Cape Breton, Nova Scotia (S. W. Loper, 1901). 



Obolus (Broggeria) salteri. 

 Lingulella concinna. 

 Schizambon priscus. 



Acrothele sp. 

 Acrotreta bisecta. 



lOg (=10f). (For stratigraphic position and association, see p. 131.) (S. W. Loper, 1901.) 



Obolus (Broggeria) salteri. 

 Lingulella concinna. 

 Schizambon priscus. 



Acrotreta bisecta. 

 Acrotliyia proavia. 



