When he got to the hair for the painting, he'd construct a boyish bob over the skull shape.
In other words, their skull shape was a basal feature.
Both groups have short skulls, tall sagittal crests, and the general skull shape is very similar.
The hybrids also tended to have strange dental, horn, and skull shapes.
Other experts have argued that neither skull shapes nor nasal openings are a reliable indication of race.
However various experts have pointed out that skull shapes etc. are not actually a reliable indication of ancestry.
"Race," a somewhat freewheeling term as it was used in the early twentieth century, denoted everything from skin color to skull shape to language.
It could be aimed at creating a skull shape which is aesthetically more pleasing or associated with desirable attributes.
The two brothers were identical as to build, coloring, and skull shape.
The exact lengths are dependent on skull shape and the style of flat top.