Science. 



N. S., Vol. IX., Plate V. 



Fig. 1 Kwe born 1892, nipples increased by 

 selective bitcdiug. 



Fig. 1. Normal milk-bag of ewe showing two 

 nipples. 



Fig. 5. Ewe born 1893, nipples increased by 

 selective breeding. 



Fig. 2. One rudimentary extra nipple. — A Sport. 



^r, 



Fig. 3. Two rudimentary extra nipples. — A Fig. 6. Ewe born 1895, nipples of equal size in- 



Sport, creased by selective breeding. 



Bell on the Development by Selection of Supernumerary Mamm^ in Sheep. 



