. Annual report of the Regents of the University on the condition of the State Cabinet of Natural History, with catalogues of the same. State Cabinet of Natural History (N. Y. ); Science; Museums. No. 109.] 105 Pentamerus galeatus. Pal. , pi. 46 & 47. This widely distributed ppecics is characteristic of the compact limestones at the base of the Lower Hcldcrborg group, and is known to occur in tho same position as far south as Tennessee. It presents a great variety of form and surface markings. In New-York, the extremely young specimens are always smooth, so far as I have ob- se
. Annual report of the Regents of the University on the condition of the State Cabinet of Natural History, with catalogues of the same. State Cabinet of Natural History (N. Y. ); Science; Museums. No. 109.] 105 Pentamerus galeatus. Pal. , pi. 46 & 47. This widely distributed ppecics is characteristic of the compact limestones at the base of the Lower Hcldcrborg group, and is known to occur in tho same position as far south as Tennessee. It presents a great variety of form and surface markings. In New-York, the extremely young specimens are always smooth, so far as I have ob- served. In the various stages of growth, they present every possible degree of development in the plications; some individuals of nearly full size re- maining smooth, while others are strongly plicated before reaching half the full size. Some individuals present plications only on the mesial fold and sinus. The plications are sometimes bifurcate, as shown in a single indivi- dual on plate 46 and another on plate 47. The illustrations upon plate 40 show a few of the varieties of form and marking to which this species is 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 State Cabinet of Natural History (N. Y. ); University of the State of New York. Board of Regents. Albany, N. Y. : University of the State of New York
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectm, booksubjectscience
