. The ore deposits of Utah. 5. Dorsal Ventral view. After Girty, U. S. Geol. Survey Bull. 544, , figs. 2 and 2b, 1915. The figured speci-men is from the Wewoka quadrangle, Marginifera muricata Norwood and Pratten. Figure 6. Dorsal view. 7. Ventral view of another, more coarsely Girty, U. S. Geol. Survey Bull. 544, , figs. 3 and 4, 1915. The figured speci-mens are from the Wewoka quadrangle,Okla. Pustula nebraskensis Owen. Figure 8. Ventral view of an exfoliated specimen. 9. Dorsal view of a smaller, more perfectly pre-served Girty
. The ore deposits of Utah. 5. Dorsal Ventral view. After Girty, U. S. Geol. Survey Bull. 544, , figs. 2 and 2b, 1915. The figured speci-men is from the Wewoka quadrangle, Marginifera muricata Norwood and Pratten. Figure 6. Dorsal view. 7. Ventral view of another, more coarsely Girty, U. S. Geol. Survey Bull. 544, , figs. 3 and 4, 1915. The figured speci-mens are from the Wewoka quadrangle,Okla. Pustula nebraskensis Owen. Figure 8. Ventral view of an exfoliated specimen. 9. Dorsal view of a smaller, more perfectly pre-served Girty, U. S. Geol. Svurvey Prof. Paper 16,pi. 5, figs. 1 and 2, 1903. The figured speci-mens are from the Durango quadrangle, Colo. Pustula semipunctata Shepard. Figure 10. A ventral valve with well-preserved surface,seen from above, X Dorsal view of a characteristic Ventral view of same. The figured specimens are from the lola lime-stone, at lola, Kans. U. S. GEOLOGICAL SURVEY PROFESSIONAL PAPER HI PLATE LV. CHARACTERISTIC FOSSILS OF PENNSYLVANIAN AGE. U. B. GEOLOGICAL SURVEY PROFESSIOXAL PAPER 111 PLATE LVI
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectminesandmineralresou
