456 Duplicate Twins and Double Monsters 



do the previous ones, duplicity of the general patterns in the two individuals, 

 and a bilateral symmetry of the two sides. As in No. II, the configuration will 

 be found to be almost but not entirely identical, the only difference in the 

 left feet being due to a slight shifting of a lower triradius which deflects 

 line A in the one case to the outer and in the other to the inner margin, 

 in the right foot a digital line, the 4th, becomes recurved and lost in a 

 pattern in one individual and not in the other. The remainder of the sole 

 is the same in both. 



XII (the boys of the triplet set). The feet are typical duplicates with 

 symmetry between the right and left. The commonest characteristics of all 

 four are the following: (a) hallucal patterns of the simple loop type, opening 

 upward between the hallux and the second toe; (b) broad loops circumscrib- 

 ing the 3rd interdigital area; (c) a large lower triradius between the hallucal 

 and 2nd interdigital patterns, with radiants running to the inner and outer 

 margin, and upward. The course of these latter varies a little, making slight 

 differences like those shown in Fig. 11; (d) a curve around the upper border 

 of the 2nd interdigital area; this curve is not quite complete in one case. 

 Aside from the variation mentioned in connection with the lower triradius, 

 the only other one possible is in connection with the appearance of a hypo- 

 thenar loop in one case (Y-left). The prints, however, do not prove that this 

 is not present in the other cases as well, since they are not rolled, and this 

 pattern is usually beyond the limit of an unrolled print. 



A comparison of the girl with her brothers is interesting, and shows the 

 same decided lack of correspondence as in the palms (Figs. 8 and 9). The 

 soles are of the smooth, featureless type, and consist of oblique, approximately 

 parallel ridges without loops, curves or lower triradii. A rudiment of one of 

 the latter may be made out in the right foot. In the left foot there is a 

 pronounced calcar loop on the inner edge of the heel. 



XV. The sole patterns are typical duplicates with no essential variations 

 in the curve of the main lines nor in the types of the hallucal patterns. 

 In the left feet there is a large and conspicuous lower triradius, whose radi- 

 ants extend outwards, upwards and inwards, across the entire ball. In both, 

 the upper or ascending radiant pushes up between the hallucal pattern and 

 the outer opens at the margin just below the origin of line D. Lines B 

 and C curve around a large 3rd interdigital loop, passing each other in the 

 same relation in each case. Lines A and D meet and fuse. The hallucal 

 patterns are spirals, formed by the hallucal line and directed toward the inner 

 margin. The configuration of the right feet is almost a duplicate of the above, 

 and the two are exactly in accord with one another. In these line D fuses, 

 not with line A, but with the outer radiant of the lower triradius, and line A 

 passes within the loop thus formed. The 3rd digital line in both becomes 

 recurved, forming a loop about the upper end of the 2nd digital area. In one 

 point alone the two right soles show a difference, and that is in the presence 

 in X of an extra upper triradius between digits II and III, but as it appears 

 at the very margin of the print, and is barely included at that, it is more 

 than probable that a similar triradius is borne hy y a, little higher up and 

 just beyond the limit of the print. The hallucal patterns are spirals formed 

 by the hallucal lines and are the symmetrical equivalents of those in the 

 left feet. 



