Final answer:
Craniometry is the practice of measurement and classification of skulls according to racial characteristics. However, the concept of race in anthropology is scientifically invalid.
Step-by-step explanation:
The practice of measurement and classification of skulls according to racial characteristics in anthropology is called craniometry. This practice involves studying the shape and size of human skulls to classify individuals into different racial groups based on physical features. However, it is important to note that the concept of race in anthropology is considered scientifically invalid, as there is no biological basis for dividing humans into distinct categories.