A YOUNG MALE ADDER. 



(This illustration is reproduced by permission of Messrs. Blackwood and Sou from Dr. Leightou' 

 book on " The Life History of British Serpents.") 



AN OLD FEMALE ADDER. 



(This illustration is reproduced by permission of Messrs. Blackwood and Son from 

 Dr. Leighton's book on " The Life History of British Serpents.") 



