A. The extreme linear stereotype would be found in the previously
mentioned tall peoples of East Central Africa. These people are very tall and slender. The chests, shoulders, and hips are very narrow - the narrowest in the world for their height. The limbs are extremely long, especially the legs.
B. The extreme lateral stereotype would be found in some Asian and
Native Americans. Eskimos, Japanese, Samoans, Apache, and many South American Indians exhibit lateral build. A few Caucasoid groups also approach lateral build, especially the peoples of northern Europe. Laterally built people tend to have long and broad trunks, with wider chests, shoulders and hips. The widest hips of all can be found in Europeans. The limb bones tend to be short and the legs make less of a contribution to overall height.
C. Allen's rule. One primary selective force acting on body build
is Allen's rule:
Animals living in colder climates should have shorter appendages
and be more spherical than those living in warmer climates. This says that laterally built people should be found in colder climates and linearly built people in warm climates. This is true for humans on the average. The traditional comparison is between the Inuit and the Masai. The Inuit of the far north tend to be stocky with short arms and legs. The Masai of east africa tend to be very tall and slender, with long arms and legs.