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Proc. R. Irish. Academy p. 715 Haughton capital sentence on similarity of musle of man to Macacus.—

(Mivart & Murie) Has also Turner cases?

Darwin cited this in Descent 1: 129n: "The Rev. Dr. Haughton, after giving ('Proc. R. Irish Academy,' June 27, 1864, p. 715) a remarkable case of variation in the human flexor pollicis longus, adds, "This remarkable example shews that man may sometimes possess the arrangement of tendons of thumb and fingers characteristic of the macaque; but whether such a case should be regarded as a macaque passing upwards into a man, or a man passing downwards into a macaque, or as a congenital freak of nature, I cannot undertake to say." It is satisfactory to hear so capable an anatomist, and so embittered an opponent of evolutionism, admitting even the possibility of either of his first propositions."

Murie, James and Mivart, St George Jackson. 1869. On the anatomy of the Lemuroidea. (Read 17 March 1866.) Transactions of the Zoological Society of London 7 no. 1: 1-113, pls. I-IV. [CUL-DAR.LIB.PER-U1453] PDF