In PLoS Biology, volume 1, issue 1:

The source of the image in Figure 2A was incorrectly acknowledged. The correct attribution is as follows:

(A) A traditional skin color map based on the data of Biasutti. Reproduced from http://anthro.palomar.edu/vary/ with permission from Dennis O'Neil.

The full text XML and HTML versions of the article have been corrected online.