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, 
Fic. go.-—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, 
