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Download pdf Reports Dealing with the Systematic Geology and Paleontology of Maryland Volume 2, PT. 1

Download pdf Reports Dealing with the Systematic Geology and Paleontology of Maryland Volume 2, PT. 1

Reports Dealing with the Systematic Geology and Paleontology of Maryland Volume 2, PT. 1. Maryland Geological Survey

Reports Dealing with the Systematic Geology and Paleontology of Maryland Volume 2, PT. 1
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Author: Maryland Geological Survey
Page Count: 226 pages
Published Date: 01 May 2012
Publisher: Rarebooksclub.com
Publication Country: Miami Fl, United States
Language: English
ISBN: 9781235956034
File size: 18 Mb
Download Link: Reports Dealing with the Systematic Geology and Paleontology of Maryland Volume 2, PT. 1
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1904 Excerpt: ...noticeable reticulate appearance. Length, 9 mm.; diameter, 3 mm. Occurrence.--Calvert Formation. Plum Point.. Collections.--Maryland Geological Survey, Cornell University, U. S. National Museum. Scala (opalia) Prunicola n. sp. Plate LIII, Fig. C. Description.--Shell of medium length and acuteness, with about eight whorls; whorls strongly and regularly convex, except at the periphery of the body whorl where there is a sharp angle; revolving ribs obtuse, irregular in distance, six in number; interspaces gently concave, marked with very fine, closely-set, revolving threads; entire surface of the shell covered with very fine, closely-set, longitudinal threads which cross the revolving ribs; varices small, irregular; base with fine radiating, and finer concentric lines. This species has a superficial resemblance to S. reticulata, but differs in lacking distinct and regular varices, in possessing very fine revolving and longitudinal sculpture, and in having more distant and more acute revolving ribs. A single specimen has been found. Length (of fragment), 10 mm.; diameter, 5.5 mm. Occurrence.--Calvert Formation. Plum Point. Collection.--Maryland Geological Survey. Subgenus STHENORHYTIS Conrad. Scala (sthenorhytis) Expansa Conrad. Plate LIII, Fig. 7. Scalaria expansa Conrad, 1842, Proc. Nat. Inst., Bull. H, pp. 187, 194, pi. ii, fig. 3. Scala (Sthenorhytis) expansa Conrad, 1863, Proc. Acad. Nat. Sci. Phila., vol. xiv, p. 565. Scala (Sthenorhytis) expansa Meek, 1864, Miocene Check List, Smith. Misc. Coll. (183), p. 18. Description.--" Shell acutely ovate, moderately thick, with numerous robust recurved ribs, twelve in number, counting from the summit of the aperture to the reflected lip, inclusive; whirls profoundly ventricose at the sides, somewhat flattened ...

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