Arthropoda

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The classification of animals based on the principle of cephalization
James D. Dana

American Journal of Science November 1863, s2-36 (108) 321-352; DOI: https://doi.org/10.2475/ajs.s2-36.108.321
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On the rocks of the Quebec Group at Point Levis
William E. Logan

American Journal of Science November 1863, s2-36 (108) 366-377; DOI: https://doi.org/10.2475/ajs.s2-36.108.366
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On the homologies of the insectean and crustacean types
James D. Dana

American Journal of Science September 1863, s2-36 (107) 233-235; DOI: https://doi.org/10.2475/ajs.s2-36.107.233
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Thirty years retrospect of the progress in our knowledge of the geology of the older rocks
Roderick Impey Murchison

American Journal of Science January 1862, s2-33 (97) 1-21; DOI: https://doi.org/10.2475/ajs.s2-33.97.1
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On the age of the red sandstone formation of Vermont
E. Billings

American Journal of Science September 1861, s2-32 (95) 232; DOI: https://doi.org/10.2475/ajs.s2-32.95.232
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Remarks upon the atoll of Ebon, in Micronesia
E. T. Doane

American Journal of Science May 1861, s2-31 (93) 318-325; DOI: https://doi.org/10.2475/ajs.s2-31.93.318
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On the track of an animal lately found in the Potsdam Formation
W. E. Logan

American Journal of Science January 1861, s2-31 (91) 17-23; DOI: https://doi.org/10.2475/ajs.s2-31.91.17
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Additional note on the Potsdam fossils
Elkanah Billings

American Journal of Science November 1860, s2-30 (90) 337-338; DOI: https://doi.org/10.2475/ajs.s2-30.90.337
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Description of a new trilobite from the Potsdam sandstone [New York]; with a note by E. Billings
Frank Howe Bradley and Elkanah Billings

American Journal of Science September 1860, s2-30 (89) 241-243; DOI: https://doi.org/10.2475/ajs.s2-30.89.241

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