DARWIN, Charles and Alfred Russel WALLACE. "On the Tendency of Species to form Varieties; and on the Perpetuation of Varieties and Species by Means of Natural Selection" in: Journal of the Proceedings of the Linnean Society, Vol. III, No.9, pp. 45-62. London, 1858. 8o. (Uncut and unopened). Original pale pink printed wrappers (very faint spotting to edges of wrappers); quarter-morocco folding case. THE FIRST PRINTED EXPOSITION OF THE "DARWINIAN" THEORY OF EVOLUTION BY NATURAL SELECTION. One of perhaps only 250 copies in pink wrappers containing the zoology papers only, from a printing of 1000 copies total (the remaining 750 in blue wrappers with botany papers included). Freeman 346 (second variant, no priority); Grolier/Horblit 23a; PMM 344a; Norman 592.