1 98 E VOL UTION AND DISEA SE. 



instance there was a clearly defined bony prominence 

 over the infraorbital ridge of each maxillary bone ; the 

 skin in each case was freely movable over the abnormal 

 outgrowth. The ages of the men were 38, 18, and 20 

 years. The prominences had existed as long as the 

 men could remember, and caused them no inconvenience 

 (fig. 106). 



