XI. Number of entries under the same heads in 100 sets 139 XII. Index-headings under which more than 1 per cent of the sets were registered in 500 sets 140 XIII. Percentage of entries falling under a single head in 100, 300, and 500 sets 141 XIV. Number of different index-headings in 100 sets, according to the number of fingers in each set, and to the method of indexing 142 XV. Number of entries in 500 sets, each of the fore, middle, and ring-fingers only 146 XVI. Number of cases of various anthropometric data that severally fell in the three classes of large, medium, and small, when certain limiting values were adopted 159 XVII. Distribution of 500 sets of measures, each set consisting of five elements, into classes 160 XVIII. Number of the above sets that fell under the same headings 161 XIX. Further analysis of the two headings that contained the most numerous entries 162 XX. Observed random couplets 174 XXI. Calculated random couplets 174 XXII. Observed fraternal couplets 175 XXIII. Fraternal couplets--random, observed, and utmost feasible 176 XXIV. Three fingers of right hand in 150 fraternal couplets 181 XXV. Three fingers of right hand in 150 fraternal couplets-- random and observed 182 XXVI. Three fingers of right hand in 150 fraternal couplets-- resemblance measured on centesimal scale 182 XXVII. Twins 186 XXVIII. Children of like-patterned parents 188 XXIX. Paternal and maternal influence 190 XXX. Different races, percentage frequency of arches in fore-finger 194 XXXI. Distribution of number of ridges in AH, and of other measures in loops 203 XXXII. Ordinates to their schemes of distribution 204 XXXIII. Comparison of the above with calculated values 205 XXXIV. Proportions of a typical loop on the right and left thumbs respectively 209 DESCRIPTION OF THE PLATES PAGE