We may add, that the observer to whom our knowledge of bees is due, Pierre Huber, of Geneva, who published his fine works at the end of the last century, was blind, and that he was obliged to have recourse for all his observations to the eyes of an illiterate servant, François Burnens, which is a proof that this kind of study was not inordinately difficult.
The habits of other species of insects, still unknown to us, must, according to this, conceal marvels quite as great as those which the Hubers have revealed in the case of bees and ants.
Let us conclude that insects have souls, since intelligence is a faculty of the soul.
We may apply the same reasoning to fishes, reptiles, and birds. In these three classes of animals intelligence progresses towards perfection, the faculty of reason is manifest, and the degree of intelligence seems to march at a progressive rate from the fish to the reptile, and from the reptile to the bird.
In mammiferous animals we observe a degree of advance in intelligence upon the classes of animals we have just named. But, ought we to calculate the degree of intelligence of the different mammifers according to the order in which naturalists have classed these animals? Ought we to say that the strength of intelligence increases as we follow the zoological distribution of Cuvier, that is to say, that it rises from cetacea to carnivora, from carnivora to pachyderms, and from pachyderms to ruminants, &c.? No, evidently not.
It would be absurd to apportion the intellect of animals to the place which they occupy in zoological classification. We do not possess any certain method by which to form such an appreciation in detail. We remain within the terms of a very acceptable philosophical thesis in advancing our belief, in a general manner, that the intellectual faculties of animals augment from the mollusk to the mammifer, following almost exactly the progressive scale of zoological classification, but to enter into the peculiarities of these orders would be to expose ourselves to certain contradiction. In zoophytes the soul exists as a germ; this germ develops itself and grows in mollusca, and then in articulated creatures and fishes. The soul acquires certain faculties, more or less obscure and dim, when it enters the body of a reptile, and these faculties are manifestly augmented in the body of a bird. The soul is provided with far more perfected faculties when it reaches the body of a mammifer. Such is the general outline of our system.