Paleozoic

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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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On the origin of species
Theophilus Parsons

American Journal of Science July 1860, s2-30 (88) 1-13; DOI: https://doi.org/10.2475/ajs.s2-30.88.1
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On the origination and distribution of vegetable species; introductory essay to the flora of Tasmania
Joseph D. Hooker

American Journal of Science May 1860, s2-29 (87) 305-326; DOI: https://doi.org/10.2475/ajs.s2-29.87.305
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On the species of Calceola found in Tennessee
James Merrill Safford

American Journal of Science March 1860, s2-29 (86) 248-249; DOI: https://doi.org/10.2475/ajs.s2-29.86.248
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Description of nine new species of Crinoidea from the Subcarboniferous rocks of Indiana and Kentucky
Sidney Smith Lyon and S. A. Casseday

American Journal of Science January 1860, s2-29 (85) 68-79; DOI: https://doi.org/10.2475/ajs.s2-29.85.68

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