7. A magnificent example of a Grass Snake's tongue — its organ of smell. (Page 91) 



8. A combination of taste and scent. This Convolvulus Hawk Moth has been attracted to 

 the tobacco-flower by scent : it then protrudes its long proboscis (feeding-tube) and draws 

 in the sweet nectar. (Page 1 10) 





.^- 



% |fr 



