. Annals of the New York Academy of Sciences. Science. MOOK, STUDY OF THE MORRISON FORMATION 129 GASTROPODA Limncea ativuncula White, On the Fresh-Water Invertebrates of the North American Jurassic. U. S. Geol. Surv., Bull. No. 29, p. 20, pi. 4, figs. 10, 11, 1886. Limncea consortis White, On the Fresh-AVater Invertebrates of the North American Jurassic. IT. S. Geol. Surv., Bull. No. 29, p. 20, pi. 4, figs. 8, 9, Fig. 93.—Calcareous arkosic sandstone; the same rock as figs. 91 and 92. The large dark grains are partly replaced volcanic ash, and the large grain with inclusions in the cent
. Annals of the New York Academy of Sciences. Science. MOOK, STUDY OF THE MORRISON FORMATION 129 GASTROPODA Limncea ativuncula White, On the Fresh-Water Invertebrates of the North American Jurassic. U. S. Geol. Surv., Bull. No. 29, p. 20, pi. 4, figs. 10, 11, 1886. Limncea consortis White, On the Fresh-AVater Invertebrates of the North American Jurassic. IT. S. Geol. Surv., Bull. No. 29, p. 20, pi. 4, figs. 8, 9, Fig. 93.—Calcareous arkosic sandstone; the same rock as figs. 91 and 92. The large dark grains are partly replaced volcanic ash, and the large grain with inclusions in the center of the field-is unaltered volcanic ash. About 28 X. Limncea f accelerata White, On the Fresh-Water Invertebrates of the North American Jurassic. U. S. Geol. Surv., Bull. No. 29, p. 20, pi. 4, figs. 12-15, 1886. Planorbis veternus Meek and Hayden, Phila. Acad. Nat. Sci., Proc. for 1860, p. 418, 1861. Vorticifex stearnsii White, On the Fresh-Water Invertebrates of the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original New York Academy of Sciences. New York, New York Academy of Sciences
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