Coloured Figures i, 2, 3. — Circulation in Fish, Reptile, Mammal. 



In which is blood from heart ail impure ? Mixed ? Both pure and impure ? 



ma. 



Fig. 4. — Anatomy OF Carp. For description see Fig. 220, page 117. 



Fig. 5. — Harlequin Snake (Elaps). 



The Deadly 



Harlequin Snake 



is mimicked by the 



Harmless Scarlet 



Snake. 



Fig. 6. — Scarlet Snake {Lampropeltis) , 



