The Descent of Man

The Catarrhine and Platyrrhine monkeys agree
in a multitude of characters, as is shewn by
their unquestionably belonging to one and the
same Order. The many characters which they
possess in common can hardly have been independently
acquired by so many distinct species;
so that these characters must have been inherited.
But a naturalist would undoubtedly have
ranked as an ape or a monkey, an ancient form
which possessed many characters common to
the Catarrhine and Platyrrhine monkeys, other
characters in an intermediate condition, and
some few, perhaps, distinct from those now
found in either group. And as man from a genealogical
point of view belongs to the Catarrhine
or Old World stock, we must conclude,
however much the conclusion may revolt our
pride, that our early progenitors would have
been properly thus designated. (16. Haeckel has
come to this same conclusion. See 'Uber die
Entstehung des Menschengeschlechts,' in Virchow's
'Sammlung. gemein. wissen. Vortrage,'