The Descent of Man

Dr. Murie and Mr. St. George Mivart have
shewn in their Memoir on the Lemuroidea
('Transactions, Zoological Society,' vol. vii.
1869, p. 96), how extraordinarily variable some
of the muscles are in these animals, the lowest
members of the Primates. Gradations, also, in
the muscles leading to structures found in animals
still lower in the scale, are numerous in
the Lemuroidea.), has minutely described a
vast number of muscular variations in man,
which resemble normal structures in the lower
animals. The muscles which closely resemble
those regularly present in our nearest allies, the
Quadrumana, are too numerous to be here
even specified. In a single male subject, having
a strong bodily frame, and well-formed skull,
no less than seven muscular variations were
observed, all of which plainly represented
muscles proper to various kinds of apes. This
man, for instance, had on both sides of his neck
a true and powerful "levator claviculae," such
as is found in all kinds of apes, and which is