RACES AND CLASSES 192 Data for races 192 Racial differences are statistical only 193 Calculations by Mr. F. H. Collins 193 Hebrew peculiarities 194 Negro peculiarities, questionable 196 Data for different classes in temperament, faculty, etc., and results 197 M. Fere 197 CHAPTER XIII GENERA 198 Type, meaning of 198 Law of frequency of error 198 Discussion of three elements in the loops on either thumb 200-207 Proportions of typical loops 209 The patterns are transmitted under conditions of panmixia, yet do not blend 209 Their genera are not due to selection; inference 210 Sports; variations 211 DESCRIPTION OF THE TABLES PAGE Summary of evidence in favour of finger marks being persistent 96 Interpolation of ridges 104 I. Percentage frequency of Arches, Loops, and Whorls on the different digits, as observed in the 5000 digits of 500 different persons 115 II. Distribution of the A. L. W. patterns on the corresponding digits of the two hands 116 III. Percentage frequency of Arches on the digits of the two hands 117 IV. Percentage frequency of Loops on the digits of the two hands 118 V. Percentage frequency of Whorls on the digits of the two hands 118 VI_a_. Percentage of cases in which the same class of pattern occurs in the same digits of the two hands 120 VI_b_. Percentage of cases in which the same class of pattern occurs in various couplets of different digits 120 VII. Couplets of fingers of different names in the same and in the opposite hands 121 VIII. Measures of relationship between the digits on a centesimal scale 129 IX. Index to 100 sets of finger prints 133 X. Number of different index-heads in 100 sets, according to the number of digits noted 136