. Bulletin - United States National Museum. Science. 286 BULLETIN 77, UNITED STATES NATIONAL MUSEUM. Occurrence.—In America, common in most of the subdivisions of the Black River (Decorah) shales in Minnesota and Iowa and in the Clitambonites bed of the Lower Trenton of the same states. Appar- ently rare in Russia, the only known specimen being from the Ortho- ceras limestone (B3), near Baltischport, Esthonia. Plesiotype.—Cat. No. 57417, British Museum, thin section of the Russian Please note that these images are extracted from scanned page images that may have been digitally
. Bulletin - United States National Museum. Science. 286 BULLETIN 77, UNITED STATES NATIONAL MUSEUM. Occurrence.—In America, common in most of the subdivisions of the Black River (Decorah) shales in Minnesota and Iowa and in the Clitambonites bed of the Lower Trenton of the same states. Appar- ently rare in Russia, the only known specimen being from the Ortho- ceras limestone (B3), near Baltischport, Esthonia. Plesiotype.—Cat. No. 57417, British Museum, thin section of the Russian 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 United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
