On amount of modification and lines of descent in determining the position in man.
Reference to StGJM’s article "On the appendicular skeleton of the primates" Phil. Trans. R. Soc. [157 (1867): 299–430],
and his [and James Murie’s] article on lemurs ["On the anatomy of Lemuroidea"] Trans. Zool. Soc. [7 (1872): 1–114].