LOCALITIES. 191 



30n' (=30n, but in slightly higher beds). (For stratigraphic position and association, see p. 155.) (C. D. Walcott 

 and L. D. Burling, 1905.) 



30o (=14v). (For stratigraphic position and association, see p. 154.) Middle Cambrian: About 3,950 feet (1,204 m.) 

 above the Lower Cambrian and 450 feet (137.2 m.) below the Upper Cambrian, in the shaly limestones form- 

 ing lb of the Weeks limestone [Walcott, 1908f, p. 178], on the north side of Weeks Canyon, about 4 miles 

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

 cott and L. D. Burling, 1905). 



Obolus (Fordinia) perfectus. 

 Asaphiscus sp. 

 Agnostus, several species. 

 Ptychoparia. 



Crepicephalus texanus (Shumard). 



Bathyuriscus. 



Anomocare?. 



Solenopleura. 



30p. (For stratigraphic position and association, see p. 151.) Middle Cambrian: About 125 feet (38 m.) above the 

 Cambrian quartzitic sandstones on the north side of Ogden Canyon, about 1 mile (1 .6 km.) above its mouth, 

 east of Ogden, Weber County, Utah (F. B. Weeks and L. D. Burling, 1905). 



Micromitra (Paterina) labradorica utahensis. 



Obolus mcconnelli. 



Obolus (Westonia) ella. 



30q. (For stratigraphic position and association, seep. 149.) Upper Cambrian: Limestones about 2,300 feet (701 

 m.) above the Cambrian quartzitic sandstones on pipe line above limekiln in Ogden Canyon, 1 mile 

 (1.6 km.) above its mouth, east of Ogden, Weber County, Utah (F. B. Weeks and L. D. Burling, 1905). 



Obolus rotundatus. 



Lingulella manticula. 



30s. (For stratigraphic position and association, see p. 149.) Upper Cambrian: Green shale about 1,200 feet 

 (365.8 m.) above the Cambrian quartzitic sandstones on pipe line above limekiln in Ogden Canyon, 1 mile 

 (1.6 km.) above its mouth, east of Ogden, Weber County, Utah (L. D. Burling, 1905). 

 Lingulella isse. 



30u. (For stratigraphic position and association, see p. 151.) Middle Cambrian: Sandy shales about 250 feet (76.2 

 m.) above the top of the Cambrian quartzitic sandstones 4 miles (6.4 km.) northwest of Promontory Point 

 station (on the "Lucin cut-off" of the Union Pacific Railway), about halfway up west end of ridge, north of 

 Great Salt Lake, Boxelder County, Utah (F. B. Weeks, 1905). 



Micromitra (Paterina) labradorica utahensis. 



Acrotreta cf. ophirensis. 



30w. (For stratigraphic position and association, seep. 153.) Upper Cambrian: Drift bowlder of limestone supposed 

 to have come from the beds forming la of the Notch Peak limestone on Notch Peak [Walcott, 1908f, p. 

 175], found about 2 miles (3.2 km.) south of Marjum Pass, House Range [Walcott, 1908f, PI. XIII], Millard 

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



Schizambon typicalis. 

 Eoorthis desmopleura. 

 Agraulos. 



Solenopleura. 

 Illsenurus. 



30y (the metamorphosed equivalent of 30 1 at a different locality). (For stratigraphic position and association, see 

 p. 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 supposed metamorphosed equivalent of the shales forming lb 

 of the Orr formation [Walcott, 1908f, p. 176], above the granite contact on top of the ridge north of Notch 

 Peak [Walcott, 1908f, Pis. XIII and XIV], House Range, Millard County, Utah (C. D. Walcott, F. B. 

 Weeks, and L. D. Burling, 1905). 



Obolus rotundatus. 



Lingulella isse. 



Anomocare. 



302. (For stratigraphic position and association, see p. 156. ) Middle Cambrian: About 2,450 feet (746.8 m.) above 

 the Lower Cambrian and 1,950 feet (594.4 m.) below the Upper Cambrian, in the upper part of the limestone 

 forming Ic of the Marjum limestone [Walcott, 1908f, p. 180], in the long cliff about 2 miles (3.2 km.) south- 

 east of Marjum Pass, House Range [Walcott, 1908f, Pis. XIII and XV], Millard County, Utah (C. D. 

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



Acrotreta pyxidicula. 



Agnostus. 



Ptychoparia. 



