. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. Machaeracanthus peracutus. See Appendix. Madurea lahiata. See Raphistoma labiatum, Ilh. Maclurea magna, LeSueur. J. Nat. Sc. Acad. Phil., Vol. 1, 1818. Rogers, page 817, fig. 595. Em- mons, page 276, fig. 73, 1. Chazy formation, II h. It is one of the few large gasteropod shells found in the 6000 feet of limestone strata, of Blair Co., Pa., and only in the up- per half of the mass, i. e. in the Chazy subdivision,) 0. E. Hall in T 3, p 367.) The same is
. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. Machaeracanthus peracutus. See Appendix. Madurea lahiata. See Raphistoma labiatum, Ilh. Maclurea magna, LeSueur. J. Nat. Sc. Acad. Phil., Vol. 1, 1818. Rogers, page 817, fig. 595. Em- mons, page 276, fig. 73, 1. Chazy formation, II h. It is one of the few large gasteropod shells found in the 6000 feet of limestone strata, of Blair Co., Pa., and only in the up- per half of the mass, i. e. in the Chazy subdivision,) 0. E. Hall in T 3, p 367.) The same is true in Hun- tingdon and Centre Cos. (Ewing in T4, p. 423.) Note. Most commonly nothing ^' more than a white spiral line can be seen on the rock speci- men ; this line repre- senting the edge of the shell-whorl converted into crystal- line carbon- ate of lime, 24. 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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