attention is the broad contrast between the people with straight and
wavy hair, and those with crisp, woolly, or tufted hair. Bory de
St. Vincent, noting this fundamental distinction, divided mankind
accordingly into the two primary groups of _Leiotrichi_ and
_Ulotrichi_,--terms which are open to criticism, but which I adopt in
the accompanying table, because they have been used. It is better for
science to accept a faulty name which has the merit of existence, than
to burthen it with a faultless newly invented one.

Under each of these divisions are two columns, one for the
Brachycephali, or short heads, and one for the Dolichocephali[1], or
long heads. Again, each column is subdivided transversely into four
compartments, one for the "leucous," people with fair complexions and
yellow or red hair; one for the "leucomelanous," with dark hair and
pale skins; one for the "xanthomelanous," with black hair and yellow,
brown, or olive skins; and one for the "melanous," with black hair and
dark brown or blackish skins.

[Footnote 1: Skulls, the transverse diameter of which is more than
eight-tenths the long diameter, are short; those which have the
transverse diameter less than eight-tenths the longitudinal, are
long.]

LEIOTRICHI. ULOTRICHI.
______________________________ ____________________________
/ \ / \
Dolichocephali. Brachycephali. Dolichocephali. Brachycephali.
Leucous.
.... Xanthochroi ....
Leucomelanous.