THE LESSER CIVILIZATIONS 147 
caught between the teeth, sometimes the corners of the 
mouth are pulled down as if the smile were reluctant, 
and there are other individual variations in the expres- 
sions of lovely and unrestrained mirth. 
Plate XXVII. Laughing Head of the Totonacs, remarkable 
example of Freehand Modeling in Clay. Heads of this type 
probably served as decorative details on temple fronts. 
Perhaps the most famous objects found in Totonacan 
territory are the so-called “‘stone collars” or “‘sacri- 
ficial yokes.” In size and shape these resemble horse 
collars, but in contrast to somewhat similar objects from 
