Ordovician

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A new genus of Chazy sponges, Strephochetus.
Henry Martyn Seely

American Journal of Science November 1885, s3-30 (179) 355-357; DOI: https://doi.org/10.2475/ajs.s3-30.179.355
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Note on the age of the slaty and arenaceous rocks in the vicinity of Schenectady, Schenectady County, New York
Silas Watson Ford

American Journal of Science May 1885, s3-29 (173) 397-398; DOI: https://doi.org/10.2475/ajs.s3-29.173.397
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Observations upon the great fault in the vicinity of Schodack Landing, Rensselaer County, New York
Silas Watson Ford

American Journal of Science January 1885, s3-29 (169) 16-19; DOI: https://doi.org/10.2475/ajs.s3-29.169.16
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On the southward ending of a great synclinal in the Taconic Range
James Dwight Dana

American Journal of Science October 1884, s3-28 (166) 268-275; DOI: https://doi.org/10.2475/ajs.s3-28.166.268
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On the age of the glazed and contorted slaty rocks in the vicinity of Schodock Landing, Rensselaer County, New York
Silas Watson Ford

American Journal of Science September 1884, s3-28 (165) 206-208; DOI: https://doi.org/10.2475/ajs.s3-28.165.206
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Recent explorations in the Wappinger Valley limestone of Dutchess County, New York
William Buck Dwight

American Journal of Science April 1884, s3-27 (160) 249-259; DOI: https://doi.org/10.2475/ajs.s3-27.160.249
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Becraft's Mountain [Columbia County, New York]
William Morris Davis

American Journal of Science November 1883, s3-26 (155) 381-389; DOI: https://doi.org/10.2475/ajs.s3-26.155.381
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On the occurrence of Siphonotreta scotica Davidson, in the Utica Formation near Ottawa, Ont
Joseph Frederick Whiteaves

American Journal of Science October 1882, s3-24 (142) 278-279; DOI: https://doi.org/10.2475/ajs.s3-24.142.278
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Description of a new genus of the order Eurypterida from the Utica Slate
C. D. Walcott

American Journal of Science March 1882, s3-23 (135) 213-216; DOI: https://doi.org/10.2475/ajs.s3-23.135.213
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Lower Silurian fossils in northern Maine
W. W. Dodge

American Journal of Science December 1881, s3-22 (132) 434-436; DOI: https://doi.org/10.2475/ajs.s3-22.132.434

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