THE ADDER. 99 
Tongue and windpipe.—As in the ring snake, 
the tongue is provided with a strong muscular sheath, 
and is deeply bifid. It is not often that a photo- 
graph sufficiently accurately focussed can be obtained 
——ess_ 
Fic. 24.—Apbber (263 inches). 
Note — 
1. Bilid tongue, | 3. Arrangement of scales, 
2. Head plates. 4. Markings. 
to show this distinctly, but it is well seen in the view 
shown above—a large adder 264 inches long, captured 
on the Kentchurch estate. This tongue, though an 
object of terror to country-folk, is of course only used 
