ATAVISM. 



169 



later. It was a male Cercopithecus patas : in this case 

 the nipple occupied a similar position to that in the 

 macaque ; it was unassociated with glandular tissue. 

 The parts are preserved in the museum of the Royal 

 College of Surgeons, England. 



Among domesticated mammals, cows present one, 



FIG. 90. A female Patas Monkey {Cercopithecus patas] with a 

 supernumerary nipple. 



sometimes two, and even three accessory teats ; such 

 extra teats are always situated posteriorly to the normal 

 ones. In some cases they transmit milk, and cows have 

 been known to furnish milk from seven teats. An in- 

 stance has been reported to me, from a reliable source, 



