63 



Note oil a specimen of congenital suppression of the thumbs and 

 dislocation of the wrists. 



By B. C. A. Windle, M. A., M. D. (Dub.) Professor of Anatomy 

 in Uueen's College Birmingham. 



Mit 2 Figuren. 



The two hands which are here figured and which I am about to describe 

 were taken from a foetus of 7 — 8 months old which presented no other 

 obvious deformities. Both the hands are drawn over to the radial side 

 of the arm so as to form an angle with one another considerably 

 less than a right angle The prominent inferior extremity of the arm 

 in either case is formed by the skin and tissues over lying the end of 

 the ulna. The right hand, whose digits are well formed, wants the 

 thumb entirely, on the left side the thumb is represented by a minute 

 and wartlike process of skin (Fig. 1. L. X) which contains no cartilage, 

 and which is attached more to the palmar surface than to the outer 

 border of the index, close to the joint between the first and second 

 phalanges. 



LM. 



2 3 *5 



Fig. 1. 



Fig. 2. 



The pedicle by which this skin process is attached is more 

 slender than the distal part. In both hands the webbing in the inter- 

 digital spaces is somewhat more pronounced than in the nonnal con- 



