I kitea hoki e Blumenbach i te i whakawhitinga āhuatanga o tētahi rōpū ki ngā rōpū pātata, ā, i mea ake “e whakaheke ana te momo o te tāngata e mahi tika ana ki tētahi atu, ā, te taea te tohu i ngā tepega i waenganui i a rātou"."