The naturalist has lately found a monkey of the Gibbon family, which has a voice that is divided into distinct notes that correspond to our scale and run an octave or more, clear, musical, and firm. What an invaluable prize this would be for M. Offenbach and his opera bouffe! for the creature has all the flexibility and briskness, all the parody of human nature, and all the lubricity which this style of art requires, with the caudal emphasis appended; and great economy would be gained in exempting more expensive human performers from moral degradation. We would all pay our money for such an exhibition, rejoiced to see the drama recovering from its decay. But, as yet, no cosey couples of clever apes have been discovered in paroxysms of laughter over the last sylvan equivoque; nor have elephants been seen silently shaking at a joke too ponderous for their trunks to carry. Everybody has observed how ducks will gather into a corner of the farm-yard and stand still, and apparently breathless, as if listening to a jocose tale fished out of their Decameron of a gutter, then break into hearty quacking, which reminds one of the wheezing of snips of fellows over their muddy jest. But probably the ducks are only holding a caucus on the question of food, to nominate the next pool to be dredged, and make it unanimous. But when we consider that the higher animals can compare objects and make selections, exercise a memory and have association of ideas concerning each other and the outer world, we come near to that human quality which is the ground of the function of laughter. These mental traits are the buried roots of the consciousness which blossoms into smiles in the sun of wit and humor. For the power to combine or to contrast two or more objects, to remember one absent object by another present one, to experience a feeling that two objects are associated, leads to the highest manifestations of wit. In the delicate structures of men and women, which are bequests to them descending through the whole inviolate entail of Nature, refined by it and amplified till they entertain keenly the pathos of life, all mental traits accumulate into the faculty of imagination, upon which every thing that is laughable depends.