. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. Rusi. 914 Rusichnites acadicus, Dawson, Acad. Geol. 1868, page 410, page 157, casts of continuous rounded furrows, about ^in. broad, crossed by wayps and lines; and on each side of each, 1-10 in. distant, parallel interrupted lines, casts in relief; ex- actly like the tracks now made by the swimming feet and shell edges of any small King crab (li?nulus)^ and curving to and fro like these; undoubtedly made by similar small crustaceans of the Coal age. Dawson.
. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. Rusi. 914 Rusichnites acadicus, Dawson, Acad. Geol. 1868, page 410, page 157, casts of continuous rounded furrows, about ^in. broad, crossed by wayps and lines; and on each side of each, 1-10 in. distant, parallel interrupted lines, casts in relief; ex- actly like the tracks now made by the swimming feet and shell edges of any small King crab (li?nulus)^ and curving to and fro like these; undoubtedly made by similar small crustaceans of the Coal age. Dawson. See last -figure. XIIL—Note, No instance of Rusichnites showing a definite termination is reported; but Walcott has recently received for the Nat. Mus. Wash. D. 0. a slab on which a track stops behind a fossil mol- lusk as large as a man's hand. Rusophycusbilobatus (Fticoides lilobatus) Roge^rs, page 822, fig. 626. Hall, page 77, fig. 19, 1. Vanuxem, page 79^ fig. 11, 1. Clinton formation, V a, (Also in the Gin- cinnati rocks, Lo- raine, or Hudson formation. Ill J. S. A. Miller; Am. Pal. Foss., 1877). For varieties: cla- vatus^ see Hall Pal. N. , Va;— pudicus^ same. III b; V a. Subangu- latus^ same, V a.— grenvilliensis^ see Bil- lings, Pal. Foss. Vol. 1, 1862. 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 Lesley, J. P. (J. Peter), 1819-1903; Pennsylvania. Board of Commissioners for the Second Geological Survey. Harrisburg, Board of Commissioners for the Geological Survey
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