It is an easy matter to men to acquire universality, for all
terrestrial animals resemble each other as to their limbs, that is
in their muscles, sinews and bones; and they do not vary excepting
in length or in thickness, as will be shown under Anatomy. But then
there are aquatic animals which are of great variety; I will not try
to convince the painter that there is any rule for them for they are
of infinite variety, and so is the insect tribe.
506.