CHAP. XIII.] 



DIGITS : MAN. 



327 



which could be opposed to them and could perform all the move- 

 ments of flexion, &c. Internal to this three-jointed digit was a 

 rudimentary thumb having only one phalanx and no nail. [Re- 

 lations of metacarpals to each other not particularly described.] 

 Guermonprez, F., Rev. des mal. de Venfance, iv. 1886, p. 122, figs. 

 [Left hand Condition II ; right hand almost Condition III.] 



182. Girl having a three-jointed thumb, resembling a long fore- 

 finger. Annandale, Diseases of the Fingers and Toes, p. 29, PI. II. 

 fig. 19. [Condition II.] 



183. Man having a thumb with three phalanges on each hand. Feet 

 normal. In the thumbs the metacarpal is 2^ in. long; the first phalanx 

 If in., being longer than usual. The second phalanx is longer on the 

 radial side than on the external side, causing the distal phalanx to curve 

 towards the index. On the internal it measures § in., in the middle 

 \ in., and on the ulnar side \ in. The distal phalanx is 1 in. long. 

 When the left thumb is straightened it passes \ in. beyond the joint 

 between the 1st and 2nd phalanx of the index. In the right hand the 

 thumb scarcely reaches that joint. The utility of the thumb is not 

 impaired. A maternal aunt had a similar thumb on right hand. 

 Struthers, Edin. New Phil. Journ., 1863 (2), p. 102, PI. II. fig. 6. 

 [Both hands Condition II.] 



(,84. Father and three children, each having 3-phalanged thumbs shaped 

 as indices and not opposable. [Full description q.v.~\ Paternal grand- 

 mother had double-thumb. Farge, Gaz. hebd. de med. et chir., Ser. 2, 

 ii. 1866, p. 61. 



t85. Man having the following abnormalities of the digits. (Fig. 

 88). Right hand. The number of digits was normal, but the 



Fig. 88. Right and left hands of No. 485. Right hand in Condition II; left 

 hand in Condition III. (After Windle.) 



