138 EVOLUTION AND DISEASE. 
vary in size; sometimes they are no larger than split 
peas, in other cases cover several square inches, and in ex- 
ceptional cases nearly the whole of the trunk may be thus 
covered; the hair may even equal in length that growing 
on the child’s head. Several instances of hairy men of — 
this sort have been known, and an illustrative case is 
shown in fig. 76. The original drawing is preserved in 
Fic. 76.—Trunk of a Man with a large hairy mole. (After 
Lawson.) 
the museum of Middlesex Hospital. The biblical Esau 
was probably a man of this character. These are 
examples of reversion, the lanugo instead of being shed 
attains full development : we need only descend to those 
mammals most closely allied to man, and in his own 
order Primates, to find the true significance of the 
phenomenon. 
