IN TWO previous studies1 it has conclusively been demonstrated that race and sex are of the utmost importance in an appraisal of the osseous pattern of newborn infants. These studies were based on the presence or absence of the center for the cuboid bone. They revealed that this center was found to be present more frequently in Negro than in white infants of the same sex. In both races the center for the cuboid bone was found to be present more frequently in female than in male infants. It is the purpose of this report to complete the observations for the presence or absence of each of the nine other centers of ossification which may be visible in roentgenograms in the newborn infant, the weight at birth, race and sex being taken into consideration. MATERIAL FOR STUDY The material analyzed in the paper is the same as that used