io6 



THE WALKS ABROAD OF 



tions that form, as it were, three different stomachs, the 

 oesophagus, the gizzard, and the true stomach, were 



DIGESTIVE SYSTEM OF A CARNIVOROUS INSECT 



perfectly distinct; and around the canal were still 

 attached the fine tubes that are called malpighian 

 vessels, whose function is not yet very definitely 



