328 



MKRISTIC VARIATION. 



[PART i. 



i-adial digit or thumb had three phalanges in addition to the meta- 

 earpal, all the articulations being moveable. Relatively to the 

 others their digit was placed as a thumb. Left hand. The digit 

 '..n-espoinliiig with the thumb was composed of three phalanges like 

 that of the right side, and though Hnger-like in form it was 

 functionally a thumb. On the radial side of this 3-jointed digit 

 then- was a supernumerary digit composed of two phalanges articu- 

 lating with the nietacarpal bone of the 3-jointed thumb. This 

 supernumerary digit had a well-formed nail. The 3-jointed thumb 

 of the left hand was longer than that of the right hand (measure- 

 meiits given), WINDLE, B.C. A., Journ. of Anat. xxvi. 1891, p. 100, 

 PI. II. [Right hand, Condition II ; left hand, Condition III.] 



Man having 3 phalanges in the thumb of the left hand together 

 with a supernumerary digit. (Fig. 89.) This case in several 

 respects resembles the left hand of the subject described by WINDLE. 

 Th- four ringers were normal. The thumb stood in its normal 

 relations to them, but was finger-like in form, having three 

 phalanges in addition to the metacarpal. On the radial side of 



I-'l.i. S'.l. 



Bones of left hand of No. 486, shewing Condition III. 

 (After RIJKEBUSCH.) 



this 3-phalan_ned digit there was a supernumerary digit, having 

 two phalanges and a separate metacarpal, which articulated with 



tin' head of the metacarpal of the thumb .and the trapezium. In 

 the carpus of this hand there was a supernumerary bone which is 



described as an n\ I'i'/ifni/i'. The bones and muscles of this limb 



