t in this chapter is to show that there is no fundamental
difference between man and the higher mammals in their mental faculties.
Each division of the subject might have been extended into a separate
essay, but must here be treated briefly. As no classification of the
mental powers has been universally accepted, I shall arrange my remarks
in the order most convenient for my purpose; and will select those facts
which have struck me most, with the hope that they may produce some
effect on the reader.

As man possesses the same senses as the lower animals, his fundamental
intuitions must be the same. Man has also some few instincts in common,
as that of self-preservation, sexual love, the love of the mother for
her new-born offspring, the desire possessed by the latter to suck, and
so forth. But man, perhaps, has somewhat fewer instincts: than those
possessed by the animals which come next to him in the series. The orang
in the Eastern islands and the chimpanzee in Africa build platforms on
which they sleep; and as both species follow the same habit, it might be
argued that this was due to instinct, but we cannot feel sure that it is
not the result of both animals having similar wants and possessing
similar powers of reasoning. These apes, as we may assume, avoid the
many poisonous fruits of the tropics, and man has no such knowledge; but
as our domestic animals, when taken to foreign lands, and when first
turned out in the spring, often eat poisonous herbs, which they
afterward avoid, we cannot feel sure that the apes do not learn from
their own experience or from that of their parents what fruits to
select. It is, however, certain, as we shall presently see, that apes
have an instinctive dread of serpents, and probably of other dangerous
animals.

The fewness and the comparative simplicity of the instincts in the
higher animals are remarkable in contrast with those of the lower
animals. Cuvier maintained that instinct and intelligence stand in an
inverse ratio to each other; and some have thought that the intellectual
faculties of the higher animals have been gradually developed from their
instincts. But Pouchet, in an interesting essay, has shown that no such
inverse ratio really exists. Those insects which possess the most
wonderful instincts are certainly the most intelligent. In the
vertebrate series, the least intelligent members, namely fishes and
amphibians, do not possess complex instincts; and among mammals th