Abstract
Sixty-five years ago, in 1884, William Patten of Dartmouth College was already engaged in his investigations on the comparative morphology of arachnids and vertebrates; this culminated in his monumental work of 1912, The Evolution of the Vertebrates and Their Kin. After frequent study of this book ever since its publication, I regard it with profound respect even though I am forced to dispute its outstanding thesis, which was that the vertebrates had been derived from early Palaeozoic marine arachnids, the existing Limulus being a rather primitive survivor.
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