108 EVOLUTION AND DISEASE. 
of great stature “that had on every hand six fingers 
and on every foot six toes, four and twenty in number.” 
Many such cases have been observed in modern times. 
Supernumerary toes and fingers run in families not 
merely in man but in cats and dogs. Instances are 
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Fic. 55.—The hand of a baby, showing two forms of super- 
numerary digits (semi-diagrammatic). 
known in which cats have six-toed kittens as regularly 
as Dorking fowls present five pedal digits. 
In some specimens the dichotomy extends beyond 
the finger and involves the metacarpal bone. This is 
shown in the case of the silvery gibbon (fig. 56): the 
fifth digit was reduplicated and the distal end of the 
* 2 Samuel xxi. 20, 21. 
