. Cambrian Brachiopoda. Brachiopoda, Fossil. 350 CAMBRIAN Figure 24.— ilicromilra {Paterina) labraiorica utahemis (Wal- cott). A, A', A", Top, side, and back views of a ventral valve from Locality 54m, Middle Cambrian limestones in Blacksmith Fork Canyon, Cache County, Utah (U. S. Nat. Mus. Cat. No. 51434). about 1 mile ( km.) above its mouth, east of Ogden, Weber County; (30u) about 250 feet ( m.) above the top of the Cambrian quartzitic sandstones, in sandy shales, 4 miles ( km.) northwest of Promontory Point (on the " Lucia cut-off" of the Union Pacifi
. Cambrian Brachiopoda. Brachiopoda, Fossil. 350 CAMBRIAN Figure 24.— ilicromilra {Paterina) labraiorica utahemis (Wal- cott). A, A', A", Top, side, and back views of a ventral valve from Locality 54m, Middle Cambrian limestones in Blacksmith Fork Canyon, Cache County, Utah (U. S. Nat. Mus. Cat. No. 51434). about 1 mile ( km.) above its mouth, east of Ogden, Weber County; (30u) about 250 feet ( m.) above the top of the Cambrian quartzitic sandstones, in sandy shales, 4 miles ( km.) northwest of Promontory Point (on the " Lucia cut-off" of the Union Pacific Railway), about halfway up west end of ridge, north of Great Salt Lake, Boxelder County; (34m) limestone about 765 feet ( m.) above the Brigham quartzite [Walcott, 1908a, p. 8], 1 mile ( km.) northwest of Geneva (Copenhagen), east of Brigham, Boxelder County; and (32d) shales about 150 feet ( m.) above the Brigham quartz- ite fW'alcott, 1908a, p. 8], on the east side of the south fork of Paradise Dry Canyon (locally known as East Fork), east of Par- adise, Cache Valley, Cache County; all in Utah. (54a) About 750 feet ( m.) above the Brigham quartzite and 3,440 feet (1, m.) below the Upper Cambrian ia the shales forming 2a of the Ute limestone fW'alcott, 1908f, p. 196]; (54:0) about 900 feet ( km.) above the Brigham quartzite and 3,300 feet (1, m.) below the Upper Cambrian in the limestone beds forming lb of the Ute limestone fW'alcott, 1908f, p. 196]; and (54m) about 1,225 feet {. m.) above the Brigham quartzite and 2,950 feet { m.) below the Upper Cam- brian in the upper part of the limestone forming la of the Ute limestone-[Walcott, 1908f, p. 19S\; all in Blacksmith Fork Canyon, about 10 miles ( km.) east of Hyrum, Cache County, Utah. MicROMiTRA (Paterina) labradorica var. undt. This form is distinguished from Micromitra (Paterina) labradorica (Billings) and its varie- ties by having much finer and more closely arranged concen
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