PALM AND SOLE STUDIES. 239 



biological importance of the field, and feel that many weighty 

 conclusions are to be drawn from it. It is with the idea of 

 facilitating study that I give here, as the final paper in this series, 

 a bibliography of the subject, which should make the study at 

 once available to those who care to interest themselves in it. 



Still more convincing than the inheritance of the thenar pattern 

 in the hands of the H-- family is that of the calcar pattern in a 

 family which I may designate as Wh . This pattern is the 

 rarest of all friction-skin patterns known in man, and has been 

 found once by Schlaginhaufen, 1 once by Fere, 2 and, outside of 

 this family, twice by myself (Fig. 37). In the sole prints of 

 100 Liberian soldiers, collected by Starr, there is not an instance 

 of it, and Schlaginhaufen states in 1905, including all the obser- 

 vations to date, that it has never been reported in any non- 

 European race. 



As it appears upon the tread area this pattern is in the form of 

 a simple loop, with its apex fibulo-proximal and with its opening 

 directed obliquely towards the tibial and distal directions (Fig. 

 23). This loop is usually accompanied by a triradius placed 

 distally to it and on the fibular side, but this does not always 

 appear upon the tread area, and in general the portion thus 

 included gives the impression of being a part of a more complete 

 figure, the remainder of which should lie farther up on the side 

 of the foot. In fact Schlaginhaufen, who seems to be the only 

 one who has followed this pattern beyond the tread area, has 

 traced the loop in his case over the hollow on the tibial side of the 

 foot and reports that there the lines of the loop converge, turn 

 about, and form a second loop facing the other way and ac- 

 companied by a second triradius, so that the entire figure, 

 thus completed, becomes a long drawn out spiral with two loops, 

 one of which lies within the tread area. 3 



Occasionally, though not often, prints are found in which the 



1 1905; Fig. 178, p. 100. 



2 1900, Les lignes papillaries de la plante du pied, 1900; Fig. 18, p. 615. 



3 " Ich verfolgte jedoch die Crura des Sinus in tibiodistaler Richtung und gelangte 

 zu folgenden Leistenbild. Gegen die Cavitat des Fusses convergieren die Schenkel, 

 um einer iiber den anderen hinweglaufend umzubiegen; d.h., wir haben eine lang- 

 gestreckte, linksgewundene Spirale. Ihrem tibiodistalen Ende liegt ein zweiter 

 Triradius an, dessen Lage in die Fusshohlung fallt." Schlaginhaufen 1905, pp. 



100-101. 



