SENSES OF INSECTS. 247 
neral use of the antennae of insects, I shall endeavour to 
discover whether there is any part in the higher animals 
to which they may be deemed to exhibit any analogy. 
And here I must refer you to what I have said on a for- 
mer occasion upon the present subject; where I made it 
evident, I hope, that the great bulk of the parts and or- 
gans of insects, in this particular differing from the ma- 
jority of Invertebrates, are, some in one respect, some 
in another, and some in many, really analogous to those 
of the higher animals 3 ; and that a great many of them, 
though varying in their structure, have the same func- 
tions. Thus the analogues of the eyes of Vertebrates 
are for seeing; of the jaws for masticating : of the lips 
for closi?ig the mouth ,- of the legs for walking, &c. We 
have seen also very recently, that a similar analogy, more 
or less strongly marked, holds also in their internal or- 
gans 15 ; so that it may be safely affirmed, that if all the 
invertebrate insects, though gifted with numerous pecu- 
liarities, present the most striking picture of those ani- 
mals that have an internal skeleton, and more particu- 
larly of the Mammalia, — we may assume it as a proba- 
bility, the above circumstances being allowed their due 
weight, that where facts do not prove the contrary, the 
function of analogous organs is more or less synonymous, 
though perhaps the structure and modus operandi may 
be different. 
In the letter lately referred to, I observed that the an- 
tennae of insects are analogous to ears in Vertebrates c . 
Their number corresponds ; they also stand out from the 
3 Vol. III. p. 43—. b s ee above, p. 1—. 
c Vol. III. p. 46. 
