184 CAMBRIAN BRACHIOPODA. 



Matthew [1903] cites the following as occurring in Id: 

 Lingulepis gregwa. 

 Lingulepis gregwa robusta. 

 Acrotreta papillata=Acrothyra sera. 

 Acrotreta signata tarda=Acrothyra sera. 

 Orthotheca sp. 



Bradorona observator Matthew. 

 Bradorona observator benepuncta Matthew. 

 Bradorona perspicator Matthew. 

 Bradorona spectator Matthew. 

 Bradorona spectator acuta Matthew. 



14. (For stratigraphic position and association, see p. 147.) Middle Cambrian: Limestones overlying the sand- 

 stones of the Rome formation, near the wagon road and in a quarry near the railroad track, 7 miles (11.2 km.) 

 southwest of Rome [see Hayes, 1902, historical geology sheet], Floyd County, Ga. (C. D. Walcott, 1891). 



Micromitra (Iphidella) pannula. 



Billingsella appalachia? 



Dorypyge?. 



14a. (For stratigraphic position and association, see p. 147.) Middle Cambrian: Sandstone of the Rome forma- 

 tion, along First Creek Gap, 4 miles (6.4 km.) north-northeast of Knoxville [Keith, 1905, areal geology 

 sheet], Knox County, Tenn. (M. R. Campbell, 1891). 



Micromitra alabamaensis. 

 Obolus willisi. 

 Obolus (Westonia) ella. 



Lingulella similis. 

 *Wimanella saffordi. 



14b. Upper Cambrian: Limestone on Cold Creek, at north end of gorge opposite the north end of Sponge Moun- 

 tain, 2 miles (3.2 km.) south of the San Saba County line, in Llano County, Tex. (J. A. Taff, E. 0. Ulrich, 

 and J. W. Beede). 



Obolus matinalis. 



*Obolus nundina. 



Obolus sinoe. 



Lingulella acutangula. 



Lingulella upis. 



Lingulella (Lingulepis) acuminata. 



Acrotreta microscopica. 

 Billingsella coloradoensis. 

 Eoorthis indianola?. 

 Eoorthis remnicha texana. 

 Eoorthis wichitaensis. 

 Eoorthis wichitaensis Iseviusculus. 



14c. Upper Cambrian: Upper part of the limestone exposed at Baldwin's ranch, on Cold Creek, 2.5 miles 

 (4 km.) south of the San Saba County line, in Llano County, Tex. (E. 0. Ulrich). 

 Obolus matinalis. 



14e (see 14q). Upper Cambrian: Limestone in Bartlett Hollow, 2 miles (3.2 km.) southeast of the mouth of 

 Falls Creek, Burnet quadrangle (U. S. G. S.), Lampasas County, Tex. (Bailey Willis, E. 0. Ulrich, and 

 J. A. Taff). 



Obolus matinalis. 



Obolus sinoe. 



Acrotreta microscopica. 



14g(=14i). (E. 0. Ulrich, J. A. Taff, and J. W. Beede.) 

 Lingulella upis. 

 Acrotreta microscopica. 

 Billingsella coloradoensis. 



14i (=14g). Upper Cambrian: Upper part of limestone exposed 1 mile (1.6 km.) west of Cherokee, San Saba 

 County, Tex. (E. O. Uhich, J. A. Taff, and J. W. Beede). 

 Lingulella acutangula. 

 *Lingulella upis. 

 Linnarssonella girtyi. 



14k. Upper Cambrian: Limestone on Wolf Creek, 15 miles (24.2 km.) west-southwest of Sheridan, Bighorn 

 Mountains, Sheridan County, Wyo. 

 Eoorthis desmopleura. . 

 *Syntrophia rotundata. 



141. (For stratigraphic position and association, see p. 138.) Lower Cambrian: Sandstones about 2,800 feet 

 (853 m.) below the Middle Cambrian, in a horizon correlated with No. 2j of the Silver Peak group of the 

 Waucoba Springs section [Walcott, 1908f, p. 187], in the pass about 7 miles (11.2 km.) east of Resting (Fresh- 

 water) Springs, which is in the southwest corner of T. 21 N., R. 8 E., on Amargosa River, in the south- 

 eastern part of Inyo County, Cal. (R. B. Rowe, 1901). 



*Billingsella bivia. 



Olenellus fremonti Walcott 



