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Polished transverse section of the digitate reef shown in Bradley photo 248: natural size. Specimen is from Hells Canyon, sec. 22 T. 10 S., R. 25 E. Uintah County, Utah. September 15, 1925. Plate 42-A in U.S. Geological Survey. Professional paper 154. 1929.
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Confervites Mantiensis and associated coprolites; photomicrograph of cellular parts of Confervites Mantiensis Bradley: polished specimen showing sparse colony of confervities Mantiensis in a partly silicified area of an algae reef from the "Mantis beds" The white areas are calcite; the darker ones chalcedonic silica; enlarged 10 diameters. Specimen is originally from sec. 6, T. 18 S., R. 3 E. San Pete County, Utah. July 20, 1925. Plate 33-C in U.S. Geological Survey. Professional paper 154. 1929.
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Polished vertical section of a reef formed of recumbent discoid colonies of Chlorellopsis coloniata Reis. The colonies near the center and upper parts of the specimen show faintly the concentric growth layers, which are convex outward along the radii of the colonies, natural size. Specimen is from 3700 feet above the base of the Green River formation on the west side of the Duchesne-Price mail road; T.6 S, R.7 W. Duchesne County, Utah. August 31, 1925. Plate 41-A in U.S. Geological Survey. Professional paper 154. 1929.
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Isolated algal head with digitate spongy structure; resembles in form and sculpturing the marine Lithothamnion, natural size. See also Bradley 247 and 248. Specimen is from Hells Canyon, sec. 22 T. 10 S., R. 25 E. Uintah County, Utah. September 15, 1925. Plate 41-B in U.S. Geological Survey. Professional paper 154. 1929.
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Polished vertical section of a digitate algae reef; showing nuclei of dense cream colored limestone and two distinct stages of growth. The light gray finely speckled material between the columns of algal deposit is fine-grained limy sandstone: natural size. Specimen is from Hells Canyon, sec. 22 T. 10 S., R. 25 E. Uintah County, Utah. September 15, 1925. Plate 42-B in U.S. Geological Survey. Professional paper 154. 1929.
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Confervites Mantiensis and associated coprolites; photomicrograph of cellular parts of Confervites Mantiensis Bradley: of small coprolites in a partly silicified groundmass of microcline calcite, associated with filamentous algae in an algae reef from the "Manti beds"; enlarged 30 diameters. Specimen is originally from sec. 6, T. 18 S., R. 3 E. San Pete County, Utah. July 20, 1925. Portion is plate 33-B in U.S. Geological Survey. Professional paper 154. 1929.
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Confervites Mantiensis and associated coprolites; photomicrograph of cellular parts of Confervites Mantiensis Bradley: Tip of filament with quadrate cells and a bluntly tapered apical cell; resembling some species of Lyngbya; enlarged 70 diameters. Specimen is originally from sec. 6, T. 18 S., R. 3 E. San Pete County, Utah. July 20, 1925. Portion is plate 33-A (1) in U.S. Geological Survey. Professional paper 154. 1929.
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Confervites Mantiensis and associated coprolites; photomicrograph of cellular parts of Confervites Mantiensis Bradley: filament with intercalary heterocyst resembling Nostoc; enlarged 70 diameters. Specimen is originally from sec. 6, T. 18 S., R. 3 E. San Pete County, Utah. July 20, 1925. Portion is plate 33-A (3) in U.S. Geological Survey. Professional paper 154. 1929.
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Confervites Mantiensis and associated coprolites; photomicrograph of cellular parts of Confervites Mantiensis Bradley: Tip of filament with large spherical cells and a wide sheath; enlarged 70 diameters. Specimen is originally from sec. 6, T. 18 S., R. 3 E. San Pete County, Utah. July 20, 1925. Portion is plate 33-A (2) in U.S. Geological Survey. Professional paper 154. 1929.