Which is which in Blumenbach's five races?

Question

Which skull is which in this sketch:

http://en.wikipedia.org/wiki/Image:Blumenbach%27s_five_races.JPG

?

I know the middle is caucasian but the others?

The five races are:

the Caucasian race or white race; the Mongolian or yellow race; the Malayan or brown race; the Negroid, or black race; and the American or red race.

Answer 1

I won't try to distinguish which is which as these early findings of Blumenbach were in error, as he later admitted. His early studies gave credence to scientific racism and are often quoted in attempts to prove the superiority or inferiority of certain races. His later studies disproved the earlier ones, but racist do not quote these.

Answer 2

I believe there are only three races. Caucasoid, Negroid and Mongoloid (in random order).